diff --git a/other/java/client/src/main/proto/filer.proto b/other/java/client/src/main/proto/filer.proto
index 803a2ce32..1a5cfe79b 100644
--- a/other/java/client/src/main/proto/filer.proto
+++ b/other/java/client/src/main/proto/filer.proto
@@ -92,6 +92,12 @@ message ListEntriesResponse {
     Entry entry = 1;
 }
 
+message RemoteEntry {
+    int64 last_modified_at = 1;
+    int64 size = 2;
+    string e_tag = 3;
+    string storage_name = 4;
+}
 message Entry {
     string name = 1;
     bool is_directory = 2;
@@ -102,12 +108,7 @@ message Entry {
     int32 hard_link_counter = 8; // only exists in hard link meta data
     bytes content = 9; // if not empty, the file content
 
-    message Remote {
-        int64 last_modified_at = 1;
-        int64 size = 2;
-        string e_tag = 3;
-    }
-    Remote remote = 10;
+    RemoteEntry remote_entry = 10;
 }
 
 message FullEntry {
@@ -343,7 +344,9 @@ message LocateBrokerResponse {
     repeated Resource resources = 2;
 }
 
+/////////////////////////
 // Key-Value operations
+/////////////////////////
 message KvGetRequest {
     bytes key = 1;
 }
@@ -359,7 +362,9 @@ message KvPutResponse {
     string error = 1;
 }
 
+/////////////////////////
 // path-based configurations
+/////////////////////////
 message FilerConf {
     int32 version = 1;
     message PathConf {
@@ -375,6 +380,9 @@ message FilerConf {
     repeated PathConf locations = 2;
 }
 
+/////////////////////////
+// Remote Storage related
+/////////////////////////
 message RemoteConf {
     string type = 1;
     string name = 2;
@@ -383,3 +391,12 @@ message RemoteConf {
     string s3_region = 6;
     string s3_endpoint = 7;
 }
+
+message RemoteStorageMapping {
+    map<string,RemoteStorageLocation> mappings = 1;
+}
+message RemoteStorageLocation {
+    string name = 1;
+    string bucket = 2;
+    string path = 3;
+}
diff --git a/unmaintained/load_test/load_test_meta_tail/load_test_meta_tail.go b/unmaintained/load_test/load_test_meta_tail/load_test_meta_tail.go
index 53cb2f912..c521ce33e 100644
--- a/unmaintained/load_test/load_test_meta_tail/load_test_meta_tail.go
+++ b/unmaintained/load_test/load_test_meta_tail/load_test_meta_tail.go
@@ -1,14 +1,12 @@
 package main
 
 import (
-	"context"
 	"flag"
 	"fmt"
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"google.golang.org/grpc"
-	"io"
 	"strconv"
 	"time"
 )
@@ -74,38 +72,9 @@ func startGenerateMetadata() {
 
 func startSubscribeMetadata(eachEntryFunc func(event *filer_pb.SubscribeMetadataResponse) error) {
 
-	lastTsNs := int64(0)
+	tailErr := pb.FollowMetadata(*tailFiler, grpc.WithInsecure(),	"tail",
+		*dir, 0, 0, eachEntryFunc, false)
 
-	tailErr := pb.WithFilerClient(*tailFiler, grpc.WithInsecure(), func(client filer_pb.SeaweedFilerClient) error {
-
-		ctx, cancel := context.WithCancel(context.Background())
-		defer cancel()
-
-		stream, err := client.SubscribeMetadata(ctx, &filer_pb.SubscribeMetadataRequest{
-			ClientName: "tail",
-			PathPrefix: *dir,
-			SinceNs:    lastTsNs,
-		})
-		if err != nil {
-			return fmt.Errorf("listen: %v", err)
-		}
-
-		for {
-			resp, listenErr := stream.Recv()
-			if listenErr == io.EOF {
-				return nil
-			}
-			if listenErr != nil {
-				return listenErr
-			}
-			if err = eachEntryFunc(resp); err != nil {
-				glog.V(0).Infof("tail last record:%+v", time.Unix(0, lastTsNs))
-				return err
-			}
-			lastTsNs = resp.TsNs
-		}
-
-	})
 	if tailErr != nil {
 		fmt.Printf("tail %s: %v\n", *tailFiler, tailErr)
 	}
diff --git a/weed/Makefile b/weed/Makefile
index c82735a0e..ad1f0b6f9 100644
--- a/weed/Makefile
+++ b/weed/Makefile
@@ -37,3 +37,7 @@ debug_s3:
 debug_filer_copy:
 	go build -gcflags="all=-N -l"
 	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- -v=4 filer.backup -filer=localhost:8888 -filerProxy -timeAgo=10h
+
+debug_filer_remote_sync:
+	go build -gcflags="all=-N -l"
+	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- -v=4 filer.remote.sync -filer="localhost:8888" -dir=/buckets/b2 -timeAgo=10000h
diff --git a/weed/command/command.go b/weed/command/command.go
index 9ae93fe61..02de2bd35 100644
--- a/weed/command/command.go
+++ b/weed/command/command.go
@@ -21,6 +21,7 @@ var Commands = []*Command{
 	cmdFilerCopy,
 	cmdFilerMetaBackup,
 	cmdFilerMetaTail,
+	cmdFilerRemoteSynchronize,
 	cmdFilerReplicate,
 	cmdFilerSynchronize,
 	cmdFix,
diff --git a/weed/command/filer.go b/weed/command/filer.go
index 4fd2f9c72..ddee0852c 100644
--- a/weed/command/filer.go
+++ b/weed/command/filer.go
@@ -3,7 +3,6 @@ package command
 import (
 	"fmt"
 	"net/http"
-	_ "net/http/pprof"
 	"os"
 	"strconv"
 	"strings"
diff --git a/weed/command/filer_backup.go b/weed/command/filer_backup.go
index fc4dd8298..2828ccb39 100644
--- a/weed/command/filer_backup.go
+++ b/weed/command/filer_backup.go
@@ -1,16 +1,13 @@
 package command
 
 import (
-	"context"
 	"fmt"
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb"
-	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/replication/source"
 	"github.com/chrislusf/seaweedfs/weed/security"
 	"github.com/chrislusf/seaweedfs/weed/util"
 	"google.golang.org/grpc"
-	"io"
 	"time"
 )
 
@@ -110,48 +107,12 @@ func doFilerBackup(grpcDialOption grpc.DialOption, backupOption *FilerBackupOpti
 
 	processEventFn := genProcessFunction(sourcePath, targetPath, dataSink, debug)
 
-	return pb.WithFilerClient(sourceFiler, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
-
-		ctx, cancel := context.WithCancel(context.Background())
-		defer cancel()
-
-		stream, err := client.SubscribeMetadata(ctx, &filer_pb.SubscribeMetadataRequest{
-			ClientName: "backup_" + dataSink.GetName(),
-			PathPrefix: sourcePath,
-			SinceNs:    startFrom.UnixNano(),
-		})
-		if err != nil {
-			return fmt.Errorf("listen: %v", err)
-		}
-
-		var counter int64
-		var lastWriteTime time.Time
-		for {
-			resp, listenErr := stream.Recv()
-
-			if listenErr == io.EOF {
-				return nil
-			}
-			if listenErr != nil {
-				return listenErr
-			}
-
-			if err := processEventFn(resp); err != nil {
-				return fmt.Errorf("processEventFn: %v", err)
-			}
-
-			counter++
-			if lastWriteTime.Add(3 * time.Second).Before(time.Now()) {
-				glog.V(0).Infof("backup %s progressed to %v %0.2f/sec", sourceFiler, time.Unix(0, resp.TsNs), float64(counter)/float64(3))
-				counter = 0
-				lastWriteTime = time.Now()
-				if err := setOffset(grpcDialOption, sourceFiler, BackupKeyPrefix, int32(sinkId), resp.TsNs); err != nil {
-					return fmt.Errorf("setOffset: %v", err)
-				}
-			}
-
-		}
-
+	processEventFnWithOffset := pb.AddOffsetFunc(processEventFn, 3 * time.Second, func(counter int64, lastTsNs int64) error {
+		glog.V(0).Infof("backup %s progressed to %v %0.2f/sec", sourceFiler, time.Unix(0, lastTsNs), float64(counter)/float64(3))
+		return setOffset(grpcDialOption, sourceFiler, BackupKeyPrefix, int32(sinkId), lastTsNs)
 	})
 
+	return pb.FollowMetadata(sourceFiler, grpcDialOption, "backup_" + dataSink.GetName(),
+		sourcePath, startFrom.UnixNano(), 0, processEventFnWithOffset, false)
+
 }
diff --git a/weed/command/filer_meta_backup.go b/weed/command/filer_meta_backup.go
index 28bd367e7..108e76566 100644
--- a/weed/command/filer_meta_backup.go
+++ b/weed/command/filer_meta_backup.go
@@ -7,7 +7,6 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/spf13/viper"
 	"google.golang.org/grpc"
-	"io"
 	"reflect"
 	"time"
 
@@ -190,48 +189,15 @@ func (metaBackup *FilerMetaBackupOptions) streamMetadataBackup() error {
 		return nil
 	}
 
-	tailErr := pb.WithFilerClient(*metaBackup.filerAddress, metaBackup.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
-
-		ctx, cancel := context.WithCancel(context.Background())
-		defer cancel()
-
-		stream, err := client.SubscribeMetadata(ctx, &filer_pb.SubscribeMetadataRequest{
-			ClientName: "meta_backup",
-			PathPrefix: *metaBackup.filerDirectory,
-			SinceNs:    startTime.UnixNano(),
-		})
-		if err != nil {
-			return fmt.Errorf("listen: %v", err)
-		}
-
-		var counter int64
-		var lastWriteTime time.Time
-		for {
-			resp, listenErr := stream.Recv()
-			if listenErr == io.EOF {
-				return nil
-			}
-			if listenErr != nil {
-				return listenErr
-			}
-			if err = eachEntryFunc(resp); err != nil {
-				return err
-			}
-
-			counter++
-			if lastWriteTime.Add(3 * time.Second).Before(time.Now()) {
-				glog.V(0).Infof("meta backup %s progressed to %v %0.2f/sec", *metaBackup.filerAddress, time.Unix(0, resp.TsNs), float64(counter)/float64(3))
-				counter = 0
-				lastWriteTime = time.Now()
-				if err2 := metaBackup.setOffset(lastWriteTime); err2 != nil {
-					return err2
-				}
-			}
-
-		}
-
+	processEventFnWithOffset := pb.AddOffsetFunc(eachEntryFunc, 3 * time.Second, func(counter int64, lastTsNs int64) error {
+		lastTime := time.Unix(0, lastTsNs)
+		glog.V(0).Infof("meta backup %s progressed to %v %0.2f/sec", *metaBackup.filerAddress, lastTime, float64(counter)/float64(3))
+		return metaBackup.setOffset(lastTime)
 	})
-	return tailErr
+
+	return pb.FollowMetadata(*metaBackup.filerAddress, metaBackup.grpcDialOption, "meta_backup",
+		*metaBackup.filerDirectory, startTime.UnixNano(), 0, processEventFnWithOffset, false)
+
 }
 
 func (metaBackup *FilerMetaBackupOptions) getOffset() (lastWriteTime time.Time, err error) {
diff --git a/weed/command/filer_meta_tail.go b/weed/command/filer_meta_tail.go
index 76699bb5e..28c0db99b 100644
--- a/weed/command/filer_meta_tail.go
+++ b/weed/command/filer_meta_tail.go
@@ -3,16 +3,15 @@ package command
 import (
 	"context"
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/golang/protobuf/jsonpb"
 	jsoniter "github.com/json-iterator/go"
 	"github.com/olivere/elastic/v7"
-	"io"
 	"os"
 	"path/filepath"
 	"strings"
 	"time"
 
-	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/security"
 	"github.com/chrislusf/seaweedfs/weed/util"
@@ -104,37 +103,18 @@ func runFilerMetaTail(cmd *Command, args []string) bool {
 		}
 	}
 
-	tailErr := pb.WithFilerClient(*tailFiler, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
-
-		ctx, cancel := context.WithCancel(context.Background())
-		defer cancel()
-
-		stream, err := client.SubscribeMetadata(ctx, &filer_pb.SubscribeMetadataRequest{
-			ClientName: "tail",
-			PathPrefix: *tailTarget,
-			SinceNs:    time.Now().Add(-*tailStart).UnixNano(),
-		})
-		if err != nil {
-			return fmt.Errorf("listen: %v", err)
-		}
-
-		for {
-			resp, listenErr := stream.Recv()
-			if listenErr == io.EOF {
+	tailErr := pb.FollowMetadata(*tailFiler, grpcDialOption, "tail",
+		*tailTarget, time.Now().Add(-*tailStart).UnixNano(), 0,
+		func(resp *filer_pb.SubscribeMetadataResponse) error {
+			if !shouldPrint(resp) {
 				return nil
 			}
-			if listenErr != nil {
-				return listenErr
-			}
-			if !shouldPrint(resp) {
-				continue
-			}
-			if err = eachEntryFunc(resp); err != nil {
+			if err := eachEntryFunc(resp); err != nil {
 				return err
 			}
-		}
+			return nil
+		}, false)
 
-	})
 	if tailErr != nil {
 		fmt.Printf("tail %s: %v\n", *tailFiler, tailErr)
 	}
diff --git a/weed/command/filer_remote_sync.go b/weed/command/filer_remote_sync.go
new file mode 100644
index 000000000..4afb7c091
--- /dev/null
+++ b/weed/command/filer_remote_sync.go
@@ -0,0 +1,260 @@
+package command
+
+import (
+	"context"
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/filer"
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/chrislusf/seaweedfs/weed/remote_storage"
+	"github.com/chrislusf/seaweedfs/weed/replication/source"
+	"github.com/chrislusf/seaweedfs/weed/security"
+	"github.com/chrislusf/seaweedfs/weed/util"
+	"github.com/golang/protobuf/proto"
+	"google.golang.org/grpc"
+	"strings"
+	"time"
+)
+
+type RemoteSyncOptions struct {
+	filerAddress       *string
+	grpcDialOption     grpc.DialOption
+	readChunkFromFiler *bool
+	debug              *bool
+	timeAgo            *time.Duration
+	dir                *string
+}
+
+const (
+	RemoteSyncKeyPrefix = "remote.sync."
+)
+
+var _ = filer_pb.FilerClient(&RemoteSyncOptions{})
+
+func (option *RemoteSyncOptions) WithFilerClient(fn func(filer_pb.SeaweedFilerClient) error) error {
+	return pb.WithFilerClient(*option.filerAddress, option.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+		return fn(client)
+	})
+}
+func (option *RemoteSyncOptions) AdjustedUrl(location *filer_pb.Location) string {
+	return location.Url
+}
+
+var (
+	remoteSyncOptions RemoteSyncOptions
+)
+
+func init() {
+	cmdFilerRemoteSynchronize.Run = runFilerRemoteSynchronize // break init cycle
+	remoteSyncOptions.filerAddress = cmdFilerRemoteSynchronize.Flag.String("filer", "localhost:8888", "filer of the SeaweedFS cluster")
+	remoteSyncOptions.dir = cmdFilerRemoteSynchronize.Flag.String("dir", "/", "a mounted directory on filer")
+	remoteSyncOptions.readChunkFromFiler = cmdFilerRemoteSynchronize.Flag.Bool("filerProxy", false, "read file chunks from filer instead of volume servers")
+	remoteSyncOptions.debug = cmdFilerRemoteSynchronize.Flag.Bool("debug", false, "debug mode to print out filer updated remote files")
+	remoteSyncOptions.timeAgo = cmdFilerRemoteSynchronize.Flag.Duration("timeAgo", 0, "start time before now. \"300ms\", \"1.5h\" or \"2h45m\". Valid time units are \"ns\", \"us\" (or \"µs\"), \"ms\", \"s\", \"m\", \"h\"")
+}
+
+var cmdFilerRemoteSynchronize = &Command{
+	UsageLine: "filer.remote.sync -filer=<filerHost>:<filerPort> -dir=/mount/s3_on_cloud",
+	Short:     "resumeable continuously write back updates to remote storage if the directory is mounted to the remote storage",
+	Long: `resumeable continuously write back updates to remote storage if the directory is mounted to the remote storage
+
+	filer.remote.sync listens on filer update events. 
+	If any mounted remote file is updated, it will fetch the updated content,
+	and write to the remote storage.
+`,
+}
+
+func runFilerRemoteSynchronize(cmd *Command, args []string) bool {
+
+	util.LoadConfiguration("security", false)
+	grpcDialOption := security.LoadClientTLS(util.GetViper(), "grpc.client")
+	remoteSyncOptions.grpcDialOption = grpcDialOption
+
+	// read filer remote storage mount mappings
+	mappings, readErr := filer.ReadMountMappings(grpcDialOption, *remoteSyncOptions.filerAddress)
+	if readErr != nil {
+		fmt.Printf("read mount mapping: %v", readErr)
+		return false
+	}
+
+	filerSource := &source.FilerSource{}
+	filerSource.DoInitialize(
+		*remoteSyncOptions.filerAddress,
+		pb.ServerToGrpcAddress(*remoteSyncOptions.filerAddress),
+		"/", // does not matter
+		*remoteSyncOptions.readChunkFromFiler,
+	)
+
+	var found bool
+	for dir, remoteStorageMountLocation := range mappings.Mappings {
+		if *remoteSyncOptions.dir == dir {
+			found = true
+			storageConf, readErr := filer.ReadRemoteStorageConf(grpcDialOption, *remoteSyncOptions.filerAddress, remoteStorageMountLocation.Name)
+			if readErr != nil {
+				fmt.Printf("read remote storage configuration for %s: %v", dir, readErr)
+				continue
+			}
+			fmt.Printf("synchronize %s to remote storage...\n", *remoteSyncOptions.dir)
+			if err := util.Retry("filer.remote.sync "+dir, func() error {
+				return followUpdatesAndUploadToRemote(&remoteSyncOptions, filerSource, dir, storageConf, remoteStorageMountLocation)
+			}); err != nil {
+				fmt.Printf("synchronize %s: %v\n", *remoteSyncOptions.dir, err)
+			}
+			break
+		}
+	}
+	if !found {
+		fmt.Printf("directory %s is not mounted to any remote storage\n", *remoteSyncOptions.dir)
+		return false
+	}
+
+	return true
+}
+
+func followUpdatesAndUploadToRemote(option *RemoteSyncOptions, filerSource *source.FilerSource, mountedDir string, remoteStorage *filer_pb.RemoteConf, remoteStorageMountLocation *filer_pb.RemoteStorageLocation) error {
+
+	dirHash := util.HashStringToLong(mountedDir)
+
+	// 1. specified by timeAgo
+	// 2. last offset timestamp for this directory
+	// 3. directory creation time
+	var lastOffsetTs time.Time
+	if *option.timeAgo == 0 {
+		mountedDirEntry, err := filer_pb.GetEntry(option, util.FullPath(mountedDir))
+		if err != nil {
+			return fmt.Errorf("lookup %s: %v", mountedDir, err)
+		}
+
+		lastOffsetTsNs, err := getOffset(option.grpcDialOption, *option.filerAddress, RemoteSyncKeyPrefix, int32(dirHash))
+		if err == nil && mountedDirEntry.Attributes.Crtime < lastOffsetTsNs/1000000 {
+			lastOffsetTs = time.Unix(0, lastOffsetTsNs)
+			glog.V(0).Infof("resume from %v", lastOffsetTs)
+		} else {
+			lastOffsetTs = time.Unix(mountedDirEntry.Attributes.Crtime, 0)
+		}
+	} else {
+		lastOffsetTs = time.Now().Add(-*option.timeAgo)
+	}
+
+	client, err := remote_storage.GetRemoteStorage(remoteStorage)
+	if err != nil {
+		return err
+	}
+
+	eachEntryFunc := func(resp *filer_pb.SubscribeMetadataResponse) error {
+		message := resp.EventNotification
+		if message.OldEntry == nil && message.NewEntry == nil {
+			return nil
+		}
+		if message.OldEntry == nil && message.NewEntry != nil {
+			if len(message.NewEntry.Chunks) == 0 {
+				return nil
+			}
+			fmt.Printf("create: %+v\n", resp)
+			if !shouldSendToRemote(message.NewEntry) {
+				fmt.Printf("skipping creating: %+v\n", resp)
+				return nil
+			}
+			dest := toRemoteStorageLocation(util.FullPath(mountedDir), util.NewFullPath(message.NewParentPath, message.NewEntry.Name), remoteStorageMountLocation)
+			reader := filer.NewChunkStreamReader(filerSource, message.NewEntry.Chunks)
+			remoteEntry, writeErr := client.WriteFile(dest, message.NewEntry, reader)
+			if writeErr != nil {
+				return writeErr
+			}
+			return updateLocalEntry(&remoteSyncOptions, message.NewParentPath, message.NewEntry, remoteEntry)
+		}
+		if message.OldEntry != nil && message.NewEntry == nil {
+			fmt.Printf("delete: %+v\n", resp)
+			dest := toRemoteStorageLocation(util.FullPath(mountedDir), util.NewFullPath(resp.Directory, message.OldEntry.Name), remoteStorageMountLocation)
+			return client.DeleteFile(dest)
+		}
+		if message.OldEntry != nil && message.NewEntry != nil {
+			oldDest := toRemoteStorageLocation(util.FullPath(mountedDir), util.NewFullPath(resp.Directory, message.OldEntry.Name), remoteStorageMountLocation)
+			dest := toRemoteStorageLocation(util.FullPath(mountedDir), util.NewFullPath(message.NewParentPath, message.NewEntry.Name), remoteStorageMountLocation)
+			if !shouldSendToRemote(message.NewEntry) {
+				fmt.Printf("skipping updating: %+v\n", resp)
+				return nil
+			}
+			if resp.Directory == message.NewParentPath && message.OldEntry.Name == message.NewEntry.Name {
+				if isSameChunks(message.OldEntry.Chunks, message.NewEntry.Chunks) {
+					fmt.Printf("update meta: %+v\n", resp)
+					return client.UpdateFileMetadata(dest, message.NewEntry)
+				}
+			}
+			fmt.Printf("update: %+v\n", resp)
+			if err := client.DeleteFile(oldDest); err != nil {
+				return err
+			}
+			reader := filer.NewChunkStreamReader(filerSource, message.NewEntry.Chunks)
+			remoteEntry, writeErr := client.WriteFile(dest, message.NewEntry, reader)
+			if writeErr != nil {
+				return writeErr
+			}
+			return updateLocalEntry(&remoteSyncOptions, message.NewParentPath, message.NewEntry, remoteEntry)
+		}
+
+		return nil
+	}
+
+	processEventFnWithOffset := pb.AddOffsetFunc(eachEntryFunc, 3*time.Second, func(counter int64, lastTsNs int64) error {
+		lastTime := time.Unix(0, lastTsNs)
+		glog.V(0).Infof("remote sync %s progressed to %v %0.2f/sec", *option.filerAddress, lastTime, float64(counter)/float64(3))
+		return setOffset(option.grpcDialOption, *option.filerAddress, RemoteSyncKeyPrefix, int32(dirHash), lastTsNs)
+	})
+
+	return pb.FollowMetadata(*option.filerAddress, option.grpcDialOption,
+		"filer.remote.sync", mountedDir, lastOffsetTs.UnixNano(), 0, processEventFnWithOffset, false)
+}
+
+func toRemoteStorageLocation(mountDir, sourcePath util.FullPath, remoteMountLocation *filer_pb.RemoteStorageLocation) *filer_pb.RemoteStorageLocation {
+	var dest string
+	source := string(sourcePath[len(mountDir):])
+	if strings.HasSuffix(remoteMountLocation.Path, "/") {
+		dest = remoteMountLocation.Path + source[1:]
+	} else {
+		dest = remoteMountLocation.Path + source
+	}
+	return &filer_pb.RemoteStorageLocation{
+		Name:   remoteMountLocation.Name,
+		Bucket: remoteMountLocation.Bucket,
+		Path:   dest,
+	}
+}
+
+func isSameChunks(a, b []*filer_pb.FileChunk) bool {
+	if len(a) != len(b) {
+		return false
+	}
+	for i := 0; i < len(a); i++ {
+		x, y := a[i], b[i]
+		if !proto.Equal(x, y) {
+			return false
+		}
+	}
+	return true
+}
+
+func shouldSendToRemote(entry *filer_pb.Entry) bool {
+	if entry.RemoteEntry == nil {
+		return true
+	}
+	if entry.RemoteEntry.Size != int64(filer.FileSize(entry)) {
+		return true
+	}
+	if entry.RemoteEntry.LastModifiedAt < entry.Attributes.Mtime {
+		return true
+	}
+	return false
+}
+
+func updateLocalEntry(filerClient filer_pb.FilerClient, dir string, entry *filer_pb.Entry, remoteEntry *filer_pb.RemoteEntry) error {
+	entry.RemoteEntry = remoteEntry
+	return filerClient.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+		_, err := client.UpdateEntry(context.Background(), &filer_pb.UpdateEntryRequest{
+			Directory:          dir,
+			Entry:              entry,
+		})
+		return err
+	})
+}
\ No newline at end of file
diff --git a/weed/command/filer_replication.go b/weed/command/filer_replication.go
index 885c95540..bf0a3e140 100644
--- a/weed/command/filer_replication.go
+++ b/weed/command/filer_replication.go
@@ -7,12 +7,6 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/replication"
 	"github.com/chrislusf/seaweedfs/weed/replication/sink"
-	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/azuresink"
-	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/b2sink"
-	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/filersink"
-	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/gcssink"
-	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/localsink"
-	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/s3sink"
 	"github.com/chrislusf/seaweedfs/weed/replication/sub"
 	"github.com/chrislusf/seaweedfs/weed/util"
 )
diff --git a/weed/command/filer_sync.go b/weed/command/filer_sync.go
index 7cfc8a7fe..a20f17201 100644
--- a/weed/command/filer_sync.go
+++ b/weed/command/filer_sync.go
@@ -15,7 +15,6 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/util"
 	"github.com/chrislusf/seaweedfs/weed/util/grace"
 	"google.golang.org/grpc"
-	"io"
 	"strings"
 	"time"
 )
@@ -166,50 +165,14 @@ func doSubscribeFilerMetaChanges(grpcDialOption grpc.DialOption, sourceFiler, so
 		return persistEventFn(resp)
 	}
 
-	return pb.WithFilerClient(sourceFiler, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
-
-		ctx, cancel := context.WithCancel(context.Background())
-		defer cancel()
-
-		stream, err := client.SubscribeMetadata(ctx, &filer_pb.SubscribeMetadataRequest{
-			ClientName: "syncTo_" + targetFiler,
-			PathPrefix: sourcePath,
-			SinceNs:    sourceFilerOffsetTsNs,
-			Signature:  targetFilerSignature,
-		})
-		if err != nil {
-			return fmt.Errorf("listen: %v", err)
-		}
-
-		var counter int64
-		var lastWriteTime time.Time
-		for {
-			resp, listenErr := stream.Recv()
-			if listenErr == io.EOF {
-				return nil
-			}
-			if listenErr != nil {
-				return listenErr
-			}
-
-			if err := processEventFn(resp); err != nil {
-				return err
-			}
-
-			counter++
-			if lastWriteTime.Add(3 * time.Second).Before(time.Now()) {
-				glog.V(0).Infof("sync %s to %s progressed to %v %0.2f/sec", sourceFiler, targetFiler, time.Unix(0, resp.TsNs), float64(counter)/float64(3))
-				counter = 0
-				lastWriteTime = time.Now()
-				if err := setOffset(grpcDialOption, targetFiler, SyncKeyPrefix, sourceFilerSignature, resp.TsNs); err != nil {
-					return err
-				}
-			}
-
-		}
-
+	processEventFnWithOffset := pb.AddOffsetFunc(processEventFn, 3 * time.Second, func(counter int64, lastTsNs int64) error {
+		glog.V(0).Infof("sync %s to %s progressed to %v %0.2f/sec", sourceFiler, targetFiler, time.Unix(0, lastTsNs), float64(counter)/float64(3))
+		return setOffset(grpcDialOption, targetFiler, SyncKeyPrefix, sourceFilerSignature, lastTsNs)
 	})
 
+	return pb.FollowMetadata(sourceFiler, grpcDialOption,	"syncTo_" + targetFiler,
+		sourcePath, sourceFilerOffsetTsNs, targetFilerSignature, processEventFnWithOffset, false)
+
 }
 
 const (
diff --git a/weed/command/imports.go b/weed/command/imports.go
new file mode 100644
index 000000000..d7ade1379
--- /dev/null
+++ b/weed/command/imports.go
@@ -0,0 +1,31 @@
+package command
+
+import (
+	_ "net/http/pprof"
+
+	_ "github.com/chrislusf/seaweedfs/weed/remote_storage/s3"
+
+	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/azuresink"
+	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/b2sink"
+	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/filersink"
+	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/gcssink"
+	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/localsink"
+	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/s3sink"
+
+	_ "github.com/chrislusf/seaweedfs/weed/filer/cassandra"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/elastic/v7"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/etcd"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/hbase"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/leveldb"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/leveldb2"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/leveldb3"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/mongodb"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/mysql"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/mysql2"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/postgres"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/postgres2"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/redis"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/redis2"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/sqlite"
+
+)
\ No newline at end of file
diff --git a/weed/command/shell.go b/weed/command/shell.go
index c9976e809..4a9f4b027 100644
--- a/weed/command/shell.go
+++ b/weed/command/shell.go
@@ -55,6 +55,7 @@ func runShell(command *Command, args []string) bool {
 
 	var err error
 	shellOptions.FilerHost, shellOptions.FilerPort, err = util.ParseHostPort(*shellInitialFiler)
+	shellOptions.FilerAddress = *shellInitialFiler
 	if err != nil {
 		fmt.Printf("failed to parse filer %s: %v\n", *shellInitialFiler, err)
 		return false
diff --git a/weed/filer/entry.go b/weed/filer/entry.go
index ede58a384..7673365fb 100644
--- a/weed/filer/entry.go
+++ b/weed/filer/entry.go
@@ -42,7 +42,7 @@ type Entry struct {
 	HardLinkId      HardLinkId
 	HardLinkCounter int32
 	Content         []byte
-	Remote          *filer_pb.Entry_Remote
+	Remote          *filer_pb.RemoteEntry
 }
 
 func (entry *Entry) Size() uint64 {
@@ -78,7 +78,7 @@ func (entry *Entry) ToExistingProtoEntry(message *filer_pb.Entry) {
 	message.HardLinkId = entry.HardLinkId
 	message.HardLinkCounter = entry.HardLinkCounter
 	message.Content = entry.Content
-	message.Remote = entry.Remote
+	message.RemoteEntry = entry.Remote
 }
 
 func FromPbEntryToExistingEntry(message *filer_pb.Entry, fsEntry *Entry) {
@@ -88,7 +88,7 @@ func FromPbEntryToExistingEntry(message *filer_pb.Entry, fsEntry *Entry) {
 	fsEntry.HardLinkId = HardLinkId(message.HardLinkId)
 	fsEntry.HardLinkCounter = message.HardLinkCounter
 	fsEntry.Content = message.Content
-	fsEntry.Remote = message.Remote
+	fsEntry.Remote = message.RemoteEntry
 }
 
 func (entry *Entry) ToProtoFullEntry() *filer_pb.FullEntry {
diff --git a/weed/filer/filer.go b/weed/filer/filer.go
index 862f98496..1a20abefc 100644
--- a/weed/filer/filer.go
+++ b/weed/filer/filer.go
@@ -42,6 +42,7 @@ type Filer struct {
 	MetaAggregator      *MetaAggregator
 	Signature           int32
 	FilerConf           *FilerConf
+	RemoteStorage       *FilerRemoteStorage
 }
 
 func NewFiler(masters []string, grpcDialOption grpc.DialOption,
@@ -51,6 +52,7 @@ func NewFiler(masters []string, grpcDialOption grpc.DialOption,
 		fileIdDeletionQueue: util.NewUnboundedQueue(),
 		GrpcDialOption:      grpcDialOption,
 		FilerConf:           NewFilerConf(),
+		RemoteStorage:       NewFilerRemoteStorage(),
 	}
 	f.LocalMetaLogBuffer = log_buffer.NewLogBuffer("local", LogFlushInterval, f.logFlushFunc, notifyFn)
 	f.metaLogCollection = collection
diff --git a/weed/filer/filer_on_meta_event.go b/weed/filer/filer_on_meta_event.go
index 5717b2b09..34ac5321a 100644
--- a/weed/filer/filer_on_meta_event.go
+++ b/weed/filer/filer_on_meta_event.go
@@ -12,6 +12,7 @@ import (
 // onMetadataChangeEvent is triggered after filer processed change events from local or remote filers
 func (f *Filer) onMetadataChangeEvent(event *filer_pb.SubscribeMetadataResponse) {
 	f.maybeReloadFilerConfiguration(event)
+	f.maybeReloadRemoteStorageConfigurationAndMapping(event)
 	f.onBucketEvents(event)
 }
 
@@ -84,3 +85,16 @@ func (f *Filer) LoadFilerConf() {
 	}
 	f.FilerConf = fc
 }
+
+////////////////////////////////////
+// load and maintain remote storages
+////////////////////////////////////
+func (f *Filer) LoadRemoteStorageConfAndMapping() {
+	if err := f.RemoteStorage.LoadRemoteStorageConfigurationsAndMapping(f); err != nil {
+		glog.Errorf("read remote conf and mapping: %v", err)
+		return
+	}
+}
+func (f *Filer) maybeReloadRemoteStorageConfigurationAndMapping(event *filer_pb.SubscribeMetadataResponse) {
+	// FIXME add reloading
+}
diff --git a/weed/filer/filer_remote_storage.go b/weed/filer/filer_remote_storage.go
new file mode 100644
index 000000000..573dcf3e7
--- /dev/null
+++ b/weed/filer/filer_remote_storage.go
@@ -0,0 +1,182 @@
+package filer
+
+import (
+	"context"
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb"
+	"github.com/chrislusf/seaweedfs/weed/remote_storage"
+	"github.com/chrislusf/seaweedfs/weed/util"
+	"github.com/golang/protobuf/proto"
+	"google.golang.org/grpc"
+	"math"
+	"strings"
+
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/viant/ptrie"
+)
+
+const REMOTE_STORAGE_CONF_SUFFIX = ".conf"
+const REMOTE_STORAGE_MOUNT_FILE = "mount.mapping"
+
+type FilerRemoteStorage struct {
+	rules             ptrie.Trie
+	storageNameToConf map[string]*filer_pb.RemoteConf
+}
+
+func NewFilerRemoteStorage() (rs *FilerRemoteStorage) {
+	rs = &FilerRemoteStorage{
+		rules:             ptrie.New(),
+		storageNameToConf: make(map[string]*filer_pb.RemoteConf),
+	}
+	return rs
+}
+
+func (rs *FilerRemoteStorage) LoadRemoteStorageConfigurationsAndMapping(filer *Filer) (err error) {
+	// execute this on filer
+
+	entries, _, err := filer.ListDirectoryEntries(context.Background(), DirectoryEtcRemote, "", false, math.MaxInt64, "", "", "")
+	if err != nil {
+		if err == filer_pb.ErrNotFound {
+			return nil
+		}
+		glog.Errorf("read remote storage %s: %v", DirectoryEtcRemote, err)
+		return
+	}
+
+	for _, entry := range entries {
+		if entry.Name() == REMOTE_STORAGE_MOUNT_FILE {
+			if err := rs.loadRemoteStorageMountMapping(entry.Content); err != nil {
+				return err
+			}
+			continue
+		}
+		if !strings.HasSuffix(entry.Name(), REMOTE_STORAGE_CONF_SUFFIX) {
+			return nil
+		}
+		conf := &filer_pb.RemoteConf{}
+		if err := proto.Unmarshal(entry.Content, conf); err != nil {
+			return fmt.Errorf("unmarshal %s/%s: %v", DirectoryEtcRemote, entry.Name(), err)
+		}
+		rs.storageNameToConf[conf.Name] = conf
+	}
+	return nil
+}
+
+func (rs *FilerRemoteStorage) loadRemoteStorageMountMapping(data []byte) (err error) {
+	mappings := &filer_pb.RemoteStorageMapping{}
+	if err := proto.Unmarshal(data, mappings); err != nil {
+		return fmt.Errorf("unmarshal %s/%s: %v", DirectoryEtcRemote, REMOTE_STORAGE_MOUNT_FILE, err)
+	}
+	for dir, storageLocation := range mappings.Mappings {
+		rs.mapDirectoryToRemoteStorage(util.FullPath(dir), storageLocation)
+	}
+	return nil
+}
+
+func (rs *FilerRemoteStorage) mapDirectoryToRemoteStorage(dir util.FullPath, loc *filer_pb.RemoteStorageLocation) {
+	rs.rules.Put([]byte(dir+"/"), loc)
+}
+
+func (rs *FilerRemoteStorage) FindMountDirectory(p util.FullPath) (mountDir util.FullPath, remoteLocation *filer_pb.RemoteStorageLocation) {
+	rs.rules.MatchPrefix([]byte(p), func(key []byte, value interface{}) bool {
+		mountDir = util.FullPath(string(key[:len(key)-1]))
+		remoteLocation = value.(*filer_pb.RemoteStorageLocation)
+		return true
+	})
+	return
+}
+
+func (rs *FilerRemoteStorage) FindRemoteStorageClient(p util.FullPath) (client remote_storage.RemoteStorageClient, remoteConf *filer_pb.RemoteConf, found bool) {
+	var storageLocation *filer_pb.RemoteStorageLocation
+	rs.rules.MatchPrefix([]byte(p), func(key []byte, value interface{}) bool {
+		storageLocation = value.(*filer_pb.RemoteStorageLocation)
+		return true
+	})
+
+	if storageLocation == nil {
+		found = false
+		return
+	}
+
+	return rs.GetRemoteStorageClient(storageLocation.Name)
+}
+
+func (rs *FilerRemoteStorage) GetRemoteStorageClient(storageName string) (client remote_storage.RemoteStorageClient, remoteConf *filer_pb.RemoteConf, found bool) {
+	remoteConf, found = rs.storageNameToConf[storageName]
+	if !found {
+		return
+	}
+
+	var err error
+	if client, err = remote_storage.GetRemoteStorage(remoteConf); err == nil {
+		found = true
+		return
+	}
+	return
+}
+
+func UnmarshalRemoteStorageMappings(oldContent []byte) (mappings *filer_pb.RemoteStorageMapping, err error) {
+	mappings = &filer_pb.RemoteStorageMapping{
+		Mappings: make(map[string]*filer_pb.RemoteStorageLocation),
+	}
+	if len(oldContent) > 0 {
+		if err = proto.Unmarshal(oldContent, mappings); err != nil {
+			glog.Warningf("unmarshal existing mappings: %v", err)
+		}
+	}
+	return
+}
+
+func AddRemoteStorageMapping(oldContent []byte, dir string, storageLocation *filer_pb.RemoteStorageLocation) (newContent []byte, err error) {
+	mappings, unmarshalErr := UnmarshalRemoteStorageMappings(oldContent)
+	if unmarshalErr != nil {
+		// skip
+	}
+
+	// set the new mapping
+	mappings.Mappings[dir] = storageLocation
+
+	if newContent, err = proto.Marshal(mappings); err != nil {
+		return oldContent, fmt.Errorf("marshal mappings: %v", err)
+	}
+
+	return
+}
+
+
+func ReadMountMappings(grpcDialOption grpc.DialOption, filerAddress string) (mappings *filer_pb.RemoteStorageMapping, readErr error) {
+	var oldContent []byte
+	if readErr = pb.WithFilerClient(filerAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+		oldContent, readErr = ReadInsideFiler(client, DirectoryEtcRemote, REMOTE_STORAGE_MOUNT_FILE)
+		return readErr
+	}); readErr != nil {
+		return nil, readErr
+	}
+
+	mappings, readErr = UnmarshalRemoteStorageMappings(oldContent)
+	if readErr != nil {
+		return nil, fmt.Errorf("unmarshal mappings: %v", readErr)
+	}
+
+	return
+}
+
+func ReadRemoteStorageConf(grpcDialOption grpc.DialOption, filerAddress string, storageName string) (conf *filer_pb.RemoteConf, readErr error) {
+	var oldContent []byte
+	if readErr = pb.WithFilerClient(filerAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+		oldContent, readErr = ReadInsideFiler(client, DirectoryEtcRemote, storageName+REMOTE_STORAGE_CONF_SUFFIX)
+		return readErr
+	}); readErr != nil {
+		return nil, readErr
+	}
+
+	// unmarshal storage configuration
+	conf = &filer_pb.RemoteConf{}
+	if unMarshalErr := proto.Unmarshal(oldContent, conf); unMarshalErr != nil {
+		readErr = fmt.Errorf("unmarshal %s/%s: %v", DirectoryEtcRemote, storageName+REMOTE_STORAGE_CONF_SUFFIX, unMarshalErr)
+		return
+	}
+
+	return
+}
diff --git a/weed/filer/filer_remote_storage_test.go b/weed/filer/filer_remote_storage_test.go
new file mode 100644
index 000000000..427cd5a8a
--- /dev/null
+++ b/weed/filer/filer_remote_storage_test.go
@@ -0,0 +1,34 @@
+package filer
+
+import (
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestFilerRemoteStorage_FindRemoteStorageClient(t *testing.T) {
+	conf := &filer_pb.RemoteConf{
+		Name: "s7",
+		Type: "s3",
+	}
+	rs := NewFilerRemoteStorage()
+	rs.storageNameToConf[conf.Name] = conf
+
+	rs.mapDirectoryToRemoteStorage("/a/b/c", &filer_pb.RemoteStorageLocation{
+		Name:   "s7",
+		Bucket: "some",
+		Path:   "/dir",
+	})
+
+	_, _, found := rs.FindRemoteStorageClient("/a/b/c/d/e/f")
+	assert.Equal(t, true, found, "find storage client")
+
+	_, _, found2 := rs.FindRemoteStorageClient("/a/b")
+	assert.Equal(t, false, found2, "should not find storage client")
+
+	_, _, found3 := rs.FindRemoteStorageClient("/a/b/c")
+	assert.Equal(t, false, found3, "should not find storage client")
+
+	_, _, found4 := rs.FindRemoteStorageClient("/a/b/cc")
+	assert.Equal(t, false, found4, "should not find storage client")
+}
\ No newline at end of file
diff --git a/weed/filer/filer_search.go b/weed/filer/filer_search.go
index 2ee29be25..2e0336da8 100644
--- a/weed/filer/filer_search.go
+++ b/weed/filer/filer_search.go
@@ -3,6 +3,7 @@ package filer
 import (
 	"context"
 	"github.com/chrislusf/seaweedfs/weed/util"
+	"math"
 	"path/filepath"
 	"strings"
 )
@@ -27,6 +28,10 @@ func (f *Filer) ListDirectoryEntries(ctx context.Context, p util.FullPath, start
 		return true
 	})
 
+	if limit == math.MaxInt64 {
+		limit = math.MaxInt64 - 1
+	}
+
 	hasMore = int64(len(entries)) >= limit+1
 	if hasMore {
 		entries = entries[:limit]
diff --git a/weed/filer/read_remote.go b/weed/filer/read_remote.go
new file mode 100644
index 000000000..d9423ceda
--- /dev/null
+++ b/weed/filer/read_remote.go
@@ -0,0 +1,29 @@
+package filer
+
+import (
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+)
+
+func (entry *Entry) IsInRemoteOnly() bool {
+	return len(entry.Chunks) == 0 && entry.Remote != nil && entry.Remote.Size > 0
+}
+
+func (f *Filer) ReadRemote(entry *Entry, offset int64, size int64) (data[]byte, err error) {
+	client, _, found := f.RemoteStorage.GetRemoteStorageClient(entry.Remote.StorageName)
+	if !found {
+		return nil, fmt.Errorf("remote storage %v not found", entry.Remote.StorageName)
+	}
+
+	mountDir, remoteLoation := f.RemoteStorage.FindMountDirectory(entry.FullPath)
+
+	remoteFullPath := remoteLoation.Path + string(entry.FullPath[len(mountDir):])
+
+	sourceLoc := &filer_pb.RemoteStorageLocation{
+		Name:   remoteLoation.Name,
+		Bucket: remoteLoation.Bucket,
+		Path:   remoteFullPath,
+	}
+
+	return client.ReadFile(sourceLoc, offset, size)
+}
diff --git a/weed/filer/stream.go b/weed/filer/stream.go
index 3859f9a67..503e6b23f 100644
--- a/weed/filer/stream.go
+++ b/weed/filer/stream.go
@@ -91,6 +91,7 @@ func ReadAll(masterClient *wdclient.MasterClient, chunks []*filer_pb.FileChunk)
 type ChunkStreamReader struct {
 	chunkViews         []*ChunkView
 	totalSize          int64
+	logicOffset        int64
 	buffer             []byte
 	bufferOffset       int64
 	bufferPos          int
@@ -137,8 +138,7 @@ func NewChunkStreamReader(filerClient filer_pb.FilerClient, chunks []*filer_pb.F
 }
 
 func (c *ChunkStreamReader) ReadAt(p []byte, off int64) (n int, err error) {
-	_, err = c.Seek(off, io.SeekStart)
-	if err != nil {
+	if err = c.prepareBufferFor(c.logicOffset); err != nil {
 		return
 	}
 	return c.Read(p)
@@ -151,12 +151,15 @@ func (c *ChunkStreamReader) Read(p []byte) (n int, err error) {
 				return n, io.EOF
 			}
 			chunkView := c.chunkViews[c.nextChunkViewIndex]
-			c.fetchChunkToBuffer(chunkView)
+			if err = c.fetchChunkToBuffer(chunkView); err != nil {
+				return
+			}
 			c.nextChunkViewIndex++
 		}
 		t := copy(p[n:], c.buffer[c.bufferPos:])
 		c.bufferPos += t
 		n += t
+		c.logicOffset += int64(t)
 	}
 	return
 }
@@ -171,19 +174,26 @@ func (c *ChunkStreamReader) Seek(offset int64, whence int) (int64, error) {
 	switch whence {
 	case io.SeekStart:
 	case io.SeekCurrent:
-		offset += c.bufferOffset + int64(c.bufferPos)
+		offset += c.logicOffset
 	case io.SeekEnd:
 		offset = c.totalSize + offset
 	}
 	if offset > c.totalSize {
 		err = io.ErrUnexpectedEOF
+	} else {
+		c.logicOffset = offset
 	}
 
+	return offset, err
+
+}
+
+func (c *ChunkStreamReader) prepareBufferFor(offset int64) (err error) {
 	// stay in the same chunk
 	if !c.isBufferEmpty() {
 		if c.bufferOffset <= offset && offset < c.bufferOffset+int64(len(c.buffer)) {
 			c.bufferPos = int(offset - c.bufferOffset)
-			return offset, nil
+			return nil
 		}
 	}
 
@@ -192,23 +202,21 @@ func (c *ChunkStreamReader) Seek(offset int64, whence int) (int64, error) {
 		return c.chunkViews[i].LogicOffset <= offset
 	})
 	if currentChunkIndex == len(c.chunkViews) {
-		return 0, io.EOF
+		return io.EOF
 	}
 
 	// positioning within the new chunk
 	chunk := c.chunkViews[currentChunkIndex]
 	if chunk.LogicOffset <= offset && offset < chunk.LogicOffset+int64(chunk.Size) {
 		if c.isBufferEmpty() || c.bufferOffset != chunk.LogicOffset {
-			c.fetchChunkToBuffer(chunk)
+			if err = c.fetchChunkToBuffer(chunk); err != nil {
+				return
+			}
 			c.nextChunkViewIndex = currentChunkIndex + 1
 		}
 		c.bufferPos = int(offset - c.bufferOffset)
-	} else {
-		return 0, io.ErrUnexpectedEOF
 	}
-
-	return offset, err
-
+	return
 }
 
 func (c *ChunkStreamReader) fetchChunkToBuffer(chunkView *ChunkView) error {
diff --git a/weed/filesys/meta_cache/meta_cache_subscribe.go b/weed/filesys/meta_cache/meta_cache_subscribe.go
index 747ac3cb9..c650b8024 100644
--- a/weed/filesys/meta_cache/meta_cache_subscribe.go
+++ b/weed/filesys/meta_cache/meta_cache_subscribe.go
@@ -2,12 +2,9 @@ package meta_cache
 
 import (
 	"context"
-	"fmt"
-	"io"
-	"time"
-
 	"github.com/chrislusf/seaweedfs/weed/filer"
 	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/util"
 )
@@ -62,38 +59,8 @@ func SubscribeMetaEvents(mc *MetaCache, selfSignature int32, client filer_pb.Fil
 
 	}
 
-	for {
-		err := client.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
-			ctx, cancel := context.WithCancel(context.Background())
-			defer cancel()
-			stream, err := client.SubscribeMetadata(ctx, &filer_pb.SubscribeMetadataRequest{
-				ClientName: "mount",
-				PathPrefix: dir,
-				SinceNs:    lastTsNs,
-				Signature:  selfSignature,
-			})
-			if err != nil {
-				return fmt.Errorf("subscribe: %v", err)
-			}
+	return util.Retry("followMetaUpdates", func() error {
+		return pb.WithFilerClientFollowMetadata(client, "mount", dir, lastTsNs, selfSignature, processEventFn, true)
+	})
 
-			for {
-				resp, listenErr := stream.Recv()
-				if listenErr == io.EOF {
-					return nil
-				}
-				if listenErr != nil {
-					return listenErr
-				}
-
-				if err := processEventFn(resp); err != nil {
-					glog.Fatalf("process %v: %v", resp, err)
-				}
-				lastTsNs = resp.TsNs
-			}
-		})
-		if err != nil {
-			glog.Errorf("subscribing filer meta change: %v", err)
-		}
-		time.Sleep(time.Second)
-	}
 }
diff --git a/weed/pb/filer.proto b/weed/pb/filer.proto
index 803a2ce32..1a5cfe79b 100644
--- a/weed/pb/filer.proto
+++ b/weed/pb/filer.proto
@@ -92,6 +92,12 @@ message ListEntriesResponse {
     Entry entry = 1;
 }
 
+message RemoteEntry {
+    int64 last_modified_at = 1;
+    int64 size = 2;
+    string e_tag = 3;
+    string storage_name = 4;
+}
 message Entry {
     string name = 1;
     bool is_directory = 2;
@@ -102,12 +108,7 @@ message Entry {
     int32 hard_link_counter = 8; // only exists in hard link meta data
     bytes content = 9; // if not empty, the file content
 
-    message Remote {
-        int64 last_modified_at = 1;
-        int64 size = 2;
-        string e_tag = 3;
-    }
-    Remote remote = 10;
+    RemoteEntry remote_entry = 10;
 }
 
 message FullEntry {
@@ -343,7 +344,9 @@ message LocateBrokerResponse {
     repeated Resource resources = 2;
 }
 
+/////////////////////////
 // Key-Value operations
+/////////////////////////
 message KvGetRequest {
     bytes key = 1;
 }
@@ -359,7 +362,9 @@ message KvPutResponse {
     string error = 1;
 }
 
+/////////////////////////
 // path-based configurations
+/////////////////////////
 message FilerConf {
     int32 version = 1;
     message PathConf {
@@ -375,6 +380,9 @@ message FilerConf {
     repeated PathConf locations = 2;
 }
 
+/////////////////////////
+// Remote Storage related
+/////////////////////////
 message RemoteConf {
     string type = 1;
     string name = 2;
@@ -383,3 +391,12 @@ message RemoteConf {
     string s3_region = 6;
     string s3_endpoint = 7;
 }
+
+message RemoteStorageMapping {
+    map<string,RemoteStorageLocation> mappings = 1;
+}
+message RemoteStorageLocation {
+    string name = 1;
+    string bucket = 2;
+    string path = 3;
+}
diff --git a/weed/pb/filer_pb/filer.pb.go b/weed/pb/filer_pb/filer.pb.go
index 2724bc7b0..495afb21a 100644
--- a/weed/pb/filer_pb/filer.pb.go
+++ b/weed/pb/filer_pb/filer.pb.go
@@ -257,6 +257,77 @@ func (x *ListEntriesResponse) GetEntry() *Entry {
 	return nil
 }
 
+type RemoteEntry struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	LastModifiedAt int64  `protobuf:"varint,1,opt,name=last_modified_at,json=lastModifiedAt,proto3" json:"last_modified_at,omitempty"`
+	Size           int64  `protobuf:"varint,2,opt,name=size,proto3" json:"size,omitempty"`
+	ETag           string `protobuf:"bytes,3,opt,name=e_tag,json=eTag,proto3" json:"e_tag,omitempty"`
+	StorageName    string `protobuf:"bytes,4,opt,name=storage_name,json=storageName,proto3" json:"storage_name,omitempty"`
+}
+
+func (x *RemoteEntry) Reset() {
+	*x = RemoteEntry{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_filer_proto_msgTypes[4]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *RemoteEntry) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*RemoteEntry) ProtoMessage() {}
+
+func (x *RemoteEntry) ProtoReflect() protoreflect.Message {
+	mi := &file_filer_proto_msgTypes[4]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use RemoteEntry.ProtoReflect.Descriptor instead.
+func (*RemoteEntry) Descriptor() ([]byte, []int) {
+	return file_filer_proto_rawDescGZIP(), []int{4}
+}
+
+func (x *RemoteEntry) GetLastModifiedAt() int64 {
+	if x != nil {
+		return x.LastModifiedAt
+	}
+	return 0
+}
+
+func (x *RemoteEntry) GetSize() int64 {
+	if x != nil {
+		return x.Size
+	}
+	return 0
+}
+
+func (x *RemoteEntry) GetETag() string {
+	if x != nil {
+		return x.ETag
+	}
+	return ""
+}
+
+func (x *RemoteEntry) GetStorageName() string {
+	if x != nil {
+		return x.StorageName
+	}
+	return ""
+}
+
 type Entry struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -270,13 +341,13 @@ type Entry struct {
 	HardLinkId      []byte            `protobuf:"bytes,7,opt,name=hard_link_id,json=hardLinkId,proto3" json:"hard_link_id,omitempty"`
 	HardLinkCounter int32             `protobuf:"varint,8,opt,name=hard_link_counter,json=hardLinkCounter,proto3" json:"hard_link_counter,omitempty"` // only exists in hard link meta data
 	Content         []byte            `protobuf:"bytes,9,opt,name=content,proto3" json:"content,omitempty"`                                           // if not empty, the file content
-	Remote          *Entry_Remote     `protobuf:"bytes,10,opt,name=remote,proto3" json:"remote,omitempty"`
+	RemoteEntry     *RemoteEntry      `protobuf:"bytes,10,opt,name=remote_entry,json=remoteEntry,proto3" json:"remote_entry,omitempty"`
 }
 
 func (x *Entry) Reset() {
 	*x = Entry{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[4]
+		mi := &file_filer_proto_msgTypes[5]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -289,7 +360,7 @@ func (x *Entry) String() string {
 func (*Entry) ProtoMessage() {}
 
 func (x *Entry) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[4]
+	mi := &file_filer_proto_msgTypes[5]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -302,7 +373,7 @@ func (x *Entry) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Entry.ProtoReflect.Descriptor instead.
 func (*Entry) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{4}
+	return file_filer_proto_rawDescGZIP(), []int{5}
 }
 
 func (x *Entry) GetName() string {
@@ -361,9 +432,9 @@ func (x *Entry) GetContent() []byte {
 	return nil
 }
 
-func (x *Entry) GetRemote() *Entry_Remote {
+func (x *Entry) GetRemoteEntry() *RemoteEntry {
 	if x != nil {
-		return x.Remote
+		return x.RemoteEntry
 	}
 	return nil
 }
@@ -380,7 +451,7 @@ type FullEntry struct {
 func (x *FullEntry) Reset() {
 	*x = FullEntry{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[5]
+		mi := &file_filer_proto_msgTypes[6]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -393,7 +464,7 @@ func (x *FullEntry) String() string {
 func (*FullEntry) ProtoMessage() {}
 
 func (x *FullEntry) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[5]
+	mi := &file_filer_proto_msgTypes[6]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -406,7 +477,7 @@ func (x *FullEntry) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FullEntry.ProtoReflect.Descriptor instead.
 func (*FullEntry) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{5}
+	return file_filer_proto_rawDescGZIP(), []int{6}
 }
 
 func (x *FullEntry) GetDir() string {
@@ -439,7 +510,7 @@ type EventNotification struct {
 func (x *EventNotification) Reset() {
 	*x = EventNotification{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[6]
+		mi := &file_filer_proto_msgTypes[7]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -452,7 +523,7 @@ func (x *EventNotification) String() string {
 func (*EventNotification) ProtoMessage() {}
 
 func (x *EventNotification) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[6]
+	mi := &file_filer_proto_msgTypes[7]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -465,7 +536,7 @@ func (x *EventNotification) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use EventNotification.ProtoReflect.Descriptor instead.
 func (*EventNotification) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{6}
+	return file_filer_proto_rawDescGZIP(), []int{7}
 }
 
 func (x *EventNotification) GetOldEntry() *Entry {
@@ -531,7 +602,7 @@ type FileChunk struct {
 func (x *FileChunk) Reset() {
 	*x = FileChunk{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[7]
+		mi := &file_filer_proto_msgTypes[8]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -544,7 +615,7 @@ func (x *FileChunk) String() string {
 func (*FileChunk) ProtoMessage() {}
 
 func (x *FileChunk) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[7]
+	mi := &file_filer_proto_msgTypes[8]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -557,7 +628,7 @@ func (x *FileChunk) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FileChunk.ProtoReflect.Descriptor instead.
 func (*FileChunk) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{7}
+	return file_filer_proto_rawDescGZIP(), []int{8}
 }
 
 func (x *FileChunk) GetFileId() string {
@@ -648,7 +719,7 @@ type FileChunkManifest struct {
 func (x *FileChunkManifest) Reset() {
 	*x = FileChunkManifest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[8]
+		mi := &file_filer_proto_msgTypes[9]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -661,7 +732,7 @@ func (x *FileChunkManifest) String() string {
 func (*FileChunkManifest) ProtoMessage() {}
 
 func (x *FileChunkManifest) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[8]
+	mi := &file_filer_proto_msgTypes[9]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -674,7 +745,7 @@ func (x *FileChunkManifest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FileChunkManifest.ProtoReflect.Descriptor instead.
 func (*FileChunkManifest) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{8}
+	return file_filer_proto_rawDescGZIP(), []int{9}
 }
 
 func (x *FileChunkManifest) GetChunks() []*FileChunk {
@@ -697,7 +768,7 @@ type FileId struct {
 func (x *FileId) Reset() {
 	*x = FileId{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[9]
+		mi := &file_filer_proto_msgTypes[10]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -710,7 +781,7 @@ func (x *FileId) String() string {
 func (*FileId) ProtoMessage() {}
 
 func (x *FileId) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[9]
+	mi := &file_filer_proto_msgTypes[10]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -723,7 +794,7 @@ func (x *FileId) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FileId.ProtoReflect.Descriptor instead.
 func (*FileId) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{9}
+	return file_filer_proto_rawDescGZIP(), []int{10}
 }
 
 func (x *FileId) GetVolumeId() uint32 {
@@ -772,7 +843,7 @@ type FuseAttributes struct {
 func (x *FuseAttributes) Reset() {
 	*x = FuseAttributes{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[10]
+		mi := &file_filer_proto_msgTypes[11]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -785,7 +856,7 @@ func (x *FuseAttributes) String() string {
 func (*FuseAttributes) ProtoMessage() {}
 
 func (x *FuseAttributes) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[10]
+	mi := &file_filer_proto_msgTypes[11]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -798,7 +869,7 @@ func (x *FuseAttributes) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FuseAttributes.ProtoReflect.Descriptor instead.
 func (*FuseAttributes) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{10}
+	return file_filer_proto_rawDescGZIP(), []int{11}
 }
 
 func (x *FuseAttributes) GetFileSize() uint64 {
@@ -921,7 +992,7 @@ type CreateEntryRequest struct {
 func (x *CreateEntryRequest) Reset() {
 	*x = CreateEntryRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[11]
+		mi := &file_filer_proto_msgTypes[12]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -934,7 +1005,7 @@ func (x *CreateEntryRequest) String() string {
 func (*CreateEntryRequest) ProtoMessage() {}
 
 func (x *CreateEntryRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[11]
+	mi := &file_filer_proto_msgTypes[12]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -947,7 +1018,7 @@ func (x *CreateEntryRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CreateEntryRequest.ProtoReflect.Descriptor instead.
 func (*CreateEntryRequest) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{11}
+	return file_filer_proto_rawDescGZIP(), []int{12}
 }
 
 func (x *CreateEntryRequest) GetDirectory() string {
@@ -996,7 +1067,7 @@ type CreateEntryResponse struct {
 func (x *CreateEntryResponse) Reset() {
 	*x = CreateEntryResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[12]
+		mi := &file_filer_proto_msgTypes[13]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1009,7 +1080,7 @@ func (x *CreateEntryResponse) String() string {
 func (*CreateEntryResponse) ProtoMessage() {}
 
 func (x *CreateEntryResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[12]
+	mi := &file_filer_proto_msgTypes[13]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1022,7 +1093,7 @@ func (x *CreateEntryResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CreateEntryResponse.ProtoReflect.Descriptor instead.
 func (*CreateEntryResponse) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{12}
+	return file_filer_proto_rawDescGZIP(), []int{13}
 }
 
 func (x *CreateEntryResponse) GetError() string {
@@ -1046,7 +1117,7 @@ type UpdateEntryRequest struct {
 func (x *UpdateEntryRequest) Reset() {
 	*x = UpdateEntryRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[13]
+		mi := &file_filer_proto_msgTypes[14]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1059,7 +1130,7 @@ func (x *UpdateEntryRequest) String() string {
 func (*UpdateEntryRequest) ProtoMessage() {}
 
 func (x *UpdateEntryRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[13]
+	mi := &file_filer_proto_msgTypes[14]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1072,7 +1143,7 @@ func (x *UpdateEntryRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use UpdateEntryRequest.ProtoReflect.Descriptor instead.
 func (*UpdateEntryRequest) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{13}
+	return file_filer_proto_rawDescGZIP(), []int{14}
 }
 
 func (x *UpdateEntryRequest) GetDirectory() string {
@@ -1112,7 +1183,7 @@ type UpdateEntryResponse struct {
 func (x *UpdateEntryResponse) Reset() {
 	*x = UpdateEntryResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[14]
+		mi := &file_filer_proto_msgTypes[15]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1125,7 +1196,7 @@ func (x *UpdateEntryResponse) String() string {
 func (*UpdateEntryResponse) ProtoMessage() {}
 
 func (x *UpdateEntryResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[14]
+	mi := &file_filer_proto_msgTypes[15]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1138,7 +1209,7 @@ func (x *UpdateEntryResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use UpdateEntryResponse.ProtoReflect.Descriptor instead.
 func (*UpdateEntryResponse) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{14}
+	return file_filer_proto_rawDescGZIP(), []int{15}
 }
 
 type AppendToEntryRequest struct {
@@ -1154,7 +1225,7 @@ type AppendToEntryRequest struct {
 func (x *AppendToEntryRequest) Reset() {
 	*x = AppendToEntryRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[15]
+		mi := &file_filer_proto_msgTypes[16]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1167,7 +1238,7 @@ func (x *AppendToEntryRequest) String() string {
 func (*AppendToEntryRequest) ProtoMessage() {}
 
 func (x *AppendToEntryRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[15]
+	mi := &file_filer_proto_msgTypes[16]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1180,7 +1251,7 @@ func (x *AppendToEntryRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use AppendToEntryRequest.ProtoReflect.Descriptor instead.
 func (*AppendToEntryRequest) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{15}
+	return file_filer_proto_rawDescGZIP(), []int{16}
 }
 
 func (x *AppendToEntryRequest) GetDirectory() string {
@@ -1213,7 +1284,7 @@ type AppendToEntryResponse struct {
 func (x *AppendToEntryResponse) Reset() {
 	*x = AppendToEntryResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[16]
+		mi := &file_filer_proto_msgTypes[17]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1226,7 +1297,7 @@ func (x *AppendToEntryResponse) String() string {
 func (*AppendToEntryResponse) ProtoMessage() {}
 
 func (x *AppendToEntryResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[16]
+	mi := &file_filer_proto_msgTypes[17]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1239,7 +1310,7 @@ func (x *AppendToEntryResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use AppendToEntryResponse.ProtoReflect.Descriptor instead.
 func (*AppendToEntryResponse) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{16}
+	return file_filer_proto_rawDescGZIP(), []int{17}
 }
 
 type DeleteEntryRequest struct {
@@ -1260,7 +1331,7 @@ type DeleteEntryRequest struct {
 func (x *DeleteEntryRequest) Reset() {
 	*x = DeleteEntryRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[17]
+		mi := &file_filer_proto_msgTypes[18]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1273,7 +1344,7 @@ func (x *DeleteEntryRequest) String() string {
 func (*DeleteEntryRequest) ProtoMessage() {}
 
 func (x *DeleteEntryRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[17]
+	mi := &file_filer_proto_msgTypes[18]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1286,7 +1357,7 @@ func (x *DeleteEntryRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DeleteEntryRequest.ProtoReflect.Descriptor instead.
 func (*DeleteEntryRequest) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{17}
+	return file_filer_proto_rawDescGZIP(), []int{18}
 }
 
 func (x *DeleteEntryRequest) GetDirectory() string {
@@ -1349,7 +1420,7 @@ type DeleteEntryResponse struct {
 func (x *DeleteEntryResponse) Reset() {
 	*x = DeleteEntryResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[18]
+		mi := &file_filer_proto_msgTypes[19]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1362,7 +1433,7 @@ func (x *DeleteEntryResponse) String() string {
 func (*DeleteEntryResponse) ProtoMessage() {}
 
 func (x *DeleteEntryResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[18]
+	mi := &file_filer_proto_msgTypes[19]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1375,7 +1446,7 @@ func (x *DeleteEntryResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DeleteEntryResponse.ProtoReflect.Descriptor instead.
 func (*DeleteEntryResponse) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{18}
+	return file_filer_proto_rawDescGZIP(), []int{19}
 }
 
 func (x *DeleteEntryResponse) GetError() string {
@@ -1400,7 +1471,7 @@ type AtomicRenameEntryRequest struct {
 func (x *AtomicRenameEntryRequest) Reset() {
 	*x = AtomicRenameEntryRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[19]
+		mi := &file_filer_proto_msgTypes[20]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1413,7 +1484,7 @@ func (x *AtomicRenameEntryRequest) String() string {
 func (*AtomicRenameEntryRequest) ProtoMessage() {}
 
 func (x *AtomicRenameEntryRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[19]
+	mi := &file_filer_proto_msgTypes[20]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1426,7 +1497,7 @@ func (x *AtomicRenameEntryRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use AtomicRenameEntryRequest.ProtoReflect.Descriptor instead.
 func (*AtomicRenameEntryRequest) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{19}
+	return file_filer_proto_rawDescGZIP(), []int{20}
 }
 
 func (x *AtomicRenameEntryRequest) GetOldDirectory() string {
@@ -1473,7 +1544,7 @@ type AtomicRenameEntryResponse struct {
 func (x *AtomicRenameEntryResponse) Reset() {
 	*x = AtomicRenameEntryResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[20]
+		mi := &file_filer_proto_msgTypes[21]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1486,7 +1557,7 @@ func (x *AtomicRenameEntryResponse) String() string {
 func (*AtomicRenameEntryResponse) ProtoMessage() {}
 
 func (x *AtomicRenameEntryResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[20]
+	mi := &file_filer_proto_msgTypes[21]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1499,7 +1570,7 @@ func (x *AtomicRenameEntryResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use AtomicRenameEntryResponse.ProtoReflect.Descriptor instead.
 func (*AtomicRenameEntryResponse) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{20}
+	return file_filer_proto_rawDescGZIP(), []int{21}
 }
 
 type AssignVolumeRequest struct {
@@ -1520,7 +1591,7 @@ type AssignVolumeRequest struct {
 func (x *AssignVolumeRequest) Reset() {
 	*x = AssignVolumeRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[21]
+		mi := &file_filer_proto_msgTypes[22]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1533,7 +1604,7 @@ func (x *AssignVolumeRequest) String() string {
 func (*AssignVolumeRequest) ProtoMessage() {}
 
 func (x *AssignVolumeRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[21]
+	mi := &file_filer_proto_msgTypes[22]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1546,7 +1617,7 @@ func (x *AssignVolumeRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use AssignVolumeRequest.ProtoReflect.Descriptor instead.
 func (*AssignVolumeRequest) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{21}
+	return file_filer_proto_rawDescGZIP(), []int{22}
 }
 
 func (x *AssignVolumeRequest) GetCount() int32 {
@@ -1623,7 +1694,7 @@ type AssignVolumeResponse struct {
 func (x *AssignVolumeResponse) Reset() {
 	*x = AssignVolumeResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[22]
+		mi := &file_filer_proto_msgTypes[23]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1636,7 +1707,7 @@ func (x *AssignVolumeResponse) String() string {
 func (*AssignVolumeResponse) ProtoMessage() {}
 
 func (x *AssignVolumeResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[22]
+	mi := &file_filer_proto_msgTypes[23]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1649,7 +1720,7 @@ func (x *AssignVolumeResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use AssignVolumeResponse.ProtoReflect.Descriptor instead.
 func (*AssignVolumeResponse) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{22}
+	return file_filer_proto_rawDescGZIP(), []int{23}
 }
 
 func (x *AssignVolumeResponse) GetFileId() string {
@@ -1719,7 +1790,7 @@ type LookupVolumeRequest struct {
 func (x *LookupVolumeRequest) Reset() {
 	*x = LookupVolumeRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[23]
+		mi := &file_filer_proto_msgTypes[24]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1732,7 +1803,7 @@ func (x *LookupVolumeRequest) String() string {
 func (*LookupVolumeRequest) ProtoMessage() {}
 
 func (x *LookupVolumeRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[23]
+	mi := &file_filer_proto_msgTypes[24]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1745,7 +1816,7 @@ func (x *LookupVolumeRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use LookupVolumeRequest.ProtoReflect.Descriptor instead.
 func (*LookupVolumeRequest) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{23}
+	return file_filer_proto_rawDescGZIP(), []int{24}
 }
 
 func (x *LookupVolumeRequest) GetVolumeIds() []string {
@@ -1766,7 +1837,7 @@ type Locations struct {
 func (x *Locations) Reset() {
 	*x = Locations{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[24]
+		mi := &file_filer_proto_msgTypes[25]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1779,7 +1850,7 @@ func (x *Locations) String() string {
 func (*Locations) ProtoMessage() {}
 
 func (x *Locations) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[24]
+	mi := &file_filer_proto_msgTypes[25]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1792,7 +1863,7 @@ func (x *Locations) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Locations.ProtoReflect.Descriptor instead.
 func (*Locations) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{24}
+	return file_filer_proto_rawDescGZIP(), []int{25}
 }
 
 func (x *Locations) GetLocations() []*Location {
@@ -1814,7 +1885,7 @@ type Location struct {
 func (x *Location) Reset() {
 	*x = Location{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[25]
+		mi := &file_filer_proto_msgTypes[26]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1827,7 +1898,7 @@ func (x *Location) String() string {
 func (*Location) ProtoMessage() {}
 
 func (x *Location) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[25]
+	mi := &file_filer_proto_msgTypes[26]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1840,7 +1911,7 @@ func (x *Location) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Location.ProtoReflect.Descriptor instead.
 func (*Location) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{25}
+	return file_filer_proto_rawDescGZIP(), []int{26}
 }
 
 func (x *Location) GetUrl() string {
@@ -1868,7 +1939,7 @@ type LookupVolumeResponse struct {
 func (x *LookupVolumeResponse) Reset() {
 	*x = LookupVolumeResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[26]
+		mi := &file_filer_proto_msgTypes[27]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1881,7 +1952,7 @@ func (x *LookupVolumeResponse) String() string {
 func (*LookupVolumeResponse) ProtoMessage() {}
 
 func (x *LookupVolumeResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[26]
+	mi := &file_filer_proto_msgTypes[27]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1894,7 +1965,7 @@ func (x *LookupVolumeResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use LookupVolumeResponse.ProtoReflect.Descriptor instead.
 func (*LookupVolumeResponse) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{26}
+	return file_filer_proto_rawDescGZIP(), []int{27}
 }
 
 func (x *LookupVolumeResponse) GetLocationsMap() map[string]*Locations {
@@ -1915,7 +1986,7 @@ type Collection struct {
 func (x *Collection) Reset() {
 	*x = Collection{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[27]
+		mi := &file_filer_proto_msgTypes[28]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1928,7 +1999,7 @@ func (x *Collection) String() string {
 func (*Collection) ProtoMessage() {}
 
 func (x *Collection) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[27]
+	mi := &file_filer_proto_msgTypes[28]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1941,7 +2012,7 @@ func (x *Collection) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Collection.ProtoReflect.Descriptor instead.
 func (*Collection) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{27}
+	return file_filer_proto_rawDescGZIP(), []int{28}
 }
 
 func (x *Collection) GetName() string {
@@ -1963,7 +2034,7 @@ type CollectionListRequest struct {
 func (x *CollectionListRequest) Reset() {
 	*x = CollectionListRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[28]
+		mi := &file_filer_proto_msgTypes[29]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1976,7 +2047,7 @@ func (x *CollectionListRequest) String() string {
 func (*CollectionListRequest) ProtoMessage() {}
 
 func (x *CollectionListRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[28]
+	mi := &file_filer_proto_msgTypes[29]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1989,7 +2060,7 @@ func (x *CollectionListRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CollectionListRequest.ProtoReflect.Descriptor instead.
 func (*CollectionListRequest) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{28}
+	return file_filer_proto_rawDescGZIP(), []int{29}
 }
 
 func (x *CollectionListRequest) GetIncludeNormalVolumes() bool {
@@ -2017,7 +2088,7 @@ type CollectionListResponse struct {
 func (x *CollectionListResponse) Reset() {
 	*x = CollectionListResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[29]
+		mi := &file_filer_proto_msgTypes[30]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2030,7 +2101,7 @@ func (x *CollectionListResponse) String() string {
 func (*CollectionListResponse) ProtoMessage() {}
 
 func (x *CollectionListResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[29]
+	mi := &file_filer_proto_msgTypes[30]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2043,7 +2114,7 @@ func (x *CollectionListResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CollectionListResponse.ProtoReflect.Descriptor instead.
 func (*CollectionListResponse) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{29}
+	return file_filer_proto_rawDescGZIP(), []int{30}
 }
 
 func (x *CollectionListResponse) GetCollections() []*Collection {
@@ -2064,7 +2135,7 @@ type DeleteCollectionRequest struct {
 func (x *DeleteCollectionRequest) Reset() {
 	*x = DeleteCollectionRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[30]
+		mi := &file_filer_proto_msgTypes[31]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2077,7 +2148,7 @@ func (x *DeleteCollectionRequest) String() string {
 func (*DeleteCollectionRequest) ProtoMessage() {}
 
 func (x *DeleteCollectionRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[30]
+	mi := &file_filer_proto_msgTypes[31]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2090,7 +2161,7 @@ func (x *DeleteCollectionRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DeleteCollectionRequest.ProtoReflect.Descriptor instead.
 func (*DeleteCollectionRequest) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{30}
+	return file_filer_proto_rawDescGZIP(), []int{31}
 }
 
 func (x *DeleteCollectionRequest) GetCollection() string {
@@ -2109,7 +2180,7 @@ type DeleteCollectionResponse struct {
 func (x *DeleteCollectionResponse) Reset() {
 	*x = DeleteCollectionResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[31]
+		mi := &file_filer_proto_msgTypes[32]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2122,7 +2193,7 @@ func (x *DeleteCollectionResponse) String() string {
 func (*DeleteCollectionResponse) ProtoMessage() {}
 
 func (x *DeleteCollectionResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[31]
+	mi := &file_filer_proto_msgTypes[32]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2135,7 +2206,7 @@ func (x *DeleteCollectionResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DeleteCollectionResponse.ProtoReflect.Descriptor instead.
 func (*DeleteCollectionResponse) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{31}
+	return file_filer_proto_rawDescGZIP(), []int{32}
 }
 
 type StatisticsRequest struct {
@@ -2152,7 +2223,7 @@ type StatisticsRequest struct {
 func (x *StatisticsRequest) Reset() {
 	*x = StatisticsRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[32]
+		mi := &file_filer_proto_msgTypes[33]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2165,7 +2236,7 @@ func (x *StatisticsRequest) String() string {
 func (*StatisticsRequest) ProtoMessage() {}
 
 func (x *StatisticsRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[32]
+	mi := &file_filer_proto_msgTypes[33]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2178,7 +2249,7 @@ func (x *StatisticsRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use StatisticsRequest.ProtoReflect.Descriptor instead.
 func (*StatisticsRequest) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{32}
+	return file_filer_proto_rawDescGZIP(), []int{33}
 }
 
 func (x *StatisticsRequest) GetReplication() string {
@@ -2222,7 +2293,7 @@ type StatisticsResponse struct {
 func (x *StatisticsResponse) Reset() {
 	*x = StatisticsResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[33]
+		mi := &file_filer_proto_msgTypes[34]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2235,7 +2306,7 @@ func (x *StatisticsResponse) String() string {
 func (*StatisticsResponse) ProtoMessage() {}
 
 func (x *StatisticsResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[33]
+	mi := &file_filer_proto_msgTypes[34]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2248,7 +2319,7 @@ func (x *StatisticsResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use StatisticsResponse.ProtoReflect.Descriptor instead.
 func (*StatisticsResponse) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{33}
+	return file_filer_proto_rawDescGZIP(), []int{34}
 }
 
 func (x *StatisticsResponse) GetTotalSize() uint64 {
@@ -2281,7 +2352,7 @@ type GetFilerConfigurationRequest struct {
 func (x *GetFilerConfigurationRequest) Reset() {
 	*x = GetFilerConfigurationRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[34]
+		mi := &file_filer_proto_msgTypes[35]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2294,7 +2365,7 @@ func (x *GetFilerConfigurationRequest) String() string {
 func (*GetFilerConfigurationRequest) ProtoMessage() {}
 
 func (x *GetFilerConfigurationRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[34]
+	mi := &file_filer_proto_msgTypes[35]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2307,7 +2378,7 @@ func (x *GetFilerConfigurationRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use GetFilerConfigurationRequest.ProtoReflect.Descriptor instead.
 func (*GetFilerConfigurationRequest) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{34}
+	return file_filer_proto_rawDescGZIP(), []int{35}
 }
 
 type GetFilerConfigurationResponse struct {
@@ -2330,7 +2401,7 @@ type GetFilerConfigurationResponse struct {
 func (x *GetFilerConfigurationResponse) Reset() {
 	*x = GetFilerConfigurationResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[35]
+		mi := &file_filer_proto_msgTypes[36]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2343,7 +2414,7 @@ func (x *GetFilerConfigurationResponse) String() string {
 func (*GetFilerConfigurationResponse) ProtoMessage() {}
 
 func (x *GetFilerConfigurationResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[35]
+	mi := &file_filer_proto_msgTypes[36]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2356,7 +2427,7 @@ func (x *GetFilerConfigurationResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use GetFilerConfigurationResponse.ProtoReflect.Descriptor instead.
 func (*GetFilerConfigurationResponse) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{35}
+	return file_filer_proto_rawDescGZIP(), []int{36}
 }
 
 func (x *GetFilerConfigurationResponse) GetMasters() []string {
@@ -2443,7 +2514,7 @@ type SubscribeMetadataRequest struct {
 func (x *SubscribeMetadataRequest) Reset() {
 	*x = SubscribeMetadataRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[36]
+		mi := &file_filer_proto_msgTypes[37]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2456,7 +2527,7 @@ func (x *SubscribeMetadataRequest) String() string {
 func (*SubscribeMetadataRequest) ProtoMessage() {}
 
 func (x *SubscribeMetadataRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[36]
+	mi := &file_filer_proto_msgTypes[37]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2469,7 +2540,7 @@ func (x *SubscribeMetadataRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SubscribeMetadataRequest.ProtoReflect.Descriptor instead.
 func (*SubscribeMetadataRequest) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{36}
+	return file_filer_proto_rawDescGZIP(), []int{37}
 }
 
 func (x *SubscribeMetadataRequest) GetClientName() string {
@@ -2513,7 +2584,7 @@ type SubscribeMetadataResponse struct {
 func (x *SubscribeMetadataResponse) Reset() {
 	*x = SubscribeMetadataResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[37]
+		mi := &file_filer_proto_msgTypes[38]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2526,7 +2597,7 @@ func (x *SubscribeMetadataResponse) String() string {
 func (*SubscribeMetadataResponse) ProtoMessage() {}
 
 func (x *SubscribeMetadataResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[37]
+	mi := &file_filer_proto_msgTypes[38]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2539,7 +2610,7 @@ func (x *SubscribeMetadataResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SubscribeMetadataResponse.ProtoReflect.Descriptor instead.
 func (*SubscribeMetadataResponse) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{37}
+	return file_filer_proto_rawDescGZIP(), []int{38}
 }
 
 func (x *SubscribeMetadataResponse) GetDirectory() string {
@@ -2576,7 +2647,7 @@ type LogEntry struct {
 func (x *LogEntry) Reset() {
 	*x = LogEntry{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[38]
+		mi := &file_filer_proto_msgTypes[39]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2589,7 +2660,7 @@ func (x *LogEntry) String() string {
 func (*LogEntry) ProtoMessage() {}
 
 func (x *LogEntry) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[38]
+	mi := &file_filer_proto_msgTypes[39]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2602,7 +2673,7 @@ func (x *LogEntry) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use LogEntry.ProtoReflect.Descriptor instead.
 func (*LogEntry) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{38}
+	return file_filer_proto_rawDescGZIP(), []int{39}
 }
 
 func (x *LogEntry) GetTsNs() int64 {
@@ -2639,7 +2710,7 @@ type KeepConnectedRequest struct {
 func (x *KeepConnectedRequest) Reset() {
 	*x = KeepConnectedRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[39]
+		mi := &file_filer_proto_msgTypes[40]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2652,7 +2723,7 @@ func (x *KeepConnectedRequest) String() string {
 func (*KeepConnectedRequest) ProtoMessage() {}
 
 func (x *KeepConnectedRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[39]
+	mi := &file_filer_proto_msgTypes[40]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2665,7 +2736,7 @@ func (x *KeepConnectedRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use KeepConnectedRequest.ProtoReflect.Descriptor instead.
 func (*KeepConnectedRequest) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{39}
+	return file_filer_proto_rawDescGZIP(), []int{40}
 }
 
 func (x *KeepConnectedRequest) GetName() string {
@@ -2698,7 +2769,7 @@ type KeepConnectedResponse struct {
 func (x *KeepConnectedResponse) Reset() {
 	*x = KeepConnectedResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[40]
+		mi := &file_filer_proto_msgTypes[41]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2711,7 +2782,7 @@ func (x *KeepConnectedResponse) String() string {
 func (*KeepConnectedResponse) ProtoMessage() {}
 
 func (x *KeepConnectedResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[40]
+	mi := &file_filer_proto_msgTypes[41]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2724,7 +2795,7 @@ func (x *KeepConnectedResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use KeepConnectedResponse.ProtoReflect.Descriptor instead.
 func (*KeepConnectedResponse) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{40}
+	return file_filer_proto_rawDescGZIP(), []int{41}
 }
 
 type LocateBrokerRequest struct {
@@ -2738,7 +2809,7 @@ type LocateBrokerRequest struct {
 func (x *LocateBrokerRequest) Reset() {
 	*x = LocateBrokerRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[41]
+		mi := &file_filer_proto_msgTypes[42]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2751,7 +2822,7 @@ func (x *LocateBrokerRequest) String() string {
 func (*LocateBrokerRequest) ProtoMessage() {}
 
 func (x *LocateBrokerRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[41]
+	mi := &file_filer_proto_msgTypes[42]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2764,7 +2835,7 @@ func (x *LocateBrokerRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use LocateBrokerRequest.ProtoReflect.Descriptor instead.
 func (*LocateBrokerRequest) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{41}
+	return file_filer_proto_rawDescGZIP(), []int{42}
 }
 
 func (x *LocateBrokerRequest) GetResource() string {
@@ -2786,7 +2857,7 @@ type LocateBrokerResponse struct {
 func (x *LocateBrokerResponse) Reset() {
 	*x = LocateBrokerResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[42]
+		mi := &file_filer_proto_msgTypes[43]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2799,7 +2870,7 @@ func (x *LocateBrokerResponse) String() string {
 func (*LocateBrokerResponse) ProtoMessage() {}
 
 func (x *LocateBrokerResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[42]
+	mi := &file_filer_proto_msgTypes[43]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2812,7 +2883,7 @@ func (x *LocateBrokerResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use LocateBrokerResponse.ProtoReflect.Descriptor instead.
 func (*LocateBrokerResponse) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{42}
+	return file_filer_proto_rawDescGZIP(), []int{43}
 }
 
 func (x *LocateBrokerResponse) GetFound() bool {
@@ -2829,7 +2900,9 @@ func (x *LocateBrokerResponse) GetResources() []*LocateBrokerResponse_Resource {
 	return nil
 }
 
+/////////////////////////
 // Key-Value operations
+/////////////////////////
 type KvGetRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -2841,7 +2914,7 @@ type KvGetRequest struct {
 func (x *KvGetRequest) Reset() {
 	*x = KvGetRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[43]
+		mi := &file_filer_proto_msgTypes[44]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2854,7 +2927,7 @@ func (x *KvGetRequest) String() string {
 func (*KvGetRequest) ProtoMessage() {}
 
 func (x *KvGetRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[43]
+	mi := &file_filer_proto_msgTypes[44]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2867,7 +2940,7 @@ func (x *KvGetRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use KvGetRequest.ProtoReflect.Descriptor instead.
 func (*KvGetRequest) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{43}
+	return file_filer_proto_rawDescGZIP(), []int{44}
 }
 
 func (x *KvGetRequest) GetKey() []byte {
@@ -2889,7 +2962,7 @@ type KvGetResponse struct {
 func (x *KvGetResponse) Reset() {
 	*x = KvGetResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[44]
+		mi := &file_filer_proto_msgTypes[45]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2902,7 +2975,7 @@ func (x *KvGetResponse) String() string {
 func (*KvGetResponse) ProtoMessage() {}
 
 func (x *KvGetResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[44]
+	mi := &file_filer_proto_msgTypes[45]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2915,7 +2988,7 @@ func (x *KvGetResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use KvGetResponse.ProtoReflect.Descriptor instead.
 func (*KvGetResponse) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{44}
+	return file_filer_proto_rawDescGZIP(), []int{45}
 }
 
 func (x *KvGetResponse) GetValue() []byte {
@@ -2944,7 +3017,7 @@ type KvPutRequest struct {
 func (x *KvPutRequest) Reset() {
 	*x = KvPutRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[45]
+		mi := &file_filer_proto_msgTypes[46]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2957,7 +3030,7 @@ func (x *KvPutRequest) String() string {
 func (*KvPutRequest) ProtoMessage() {}
 
 func (x *KvPutRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[45]
+	mi := &file_filer_proto_msgTypes[46]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2970,7 +3043,7 @@ func (x *KvPutRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use KvPutRequest.ProtoReflect.Descriptor instead.
 func (*KvPutRequest) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{45}
+	return file_filer_proto_rawDescGZIP(), []int{46}
 }
 
 func (x *KvPutRequest) GetKey() []byte {
@@ -2998,7 +3071,7 @@ type KvPutResponse struct {
 func (x *KvPutResponse) Reset() {
 	*x = KvPutResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[46]
+		mi := &file_filer_proto_msgTypes[47]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3011,7 +3084,7 @@ func (x *KvPutResponse) String() string {
 func (*KvPutResponse) ProtoMessage() {}
 
 func (x *KvPutResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[46]
+	mi := &file_filer_proto_msgTypes[47]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3024,7 +3097,7 @@ func (x *KvPutResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use KvPutResponse.ProtoReflect.Descriptor instead.
 func (*KvPutResponse) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{46}
+	return file_filer_proto_rawDescGZIP(), []int{47}
 }
 
 func (x *KvPutResponse) GetError() string {
@@ -3034,7 +3107,9 @@ func (x *KvPutResponse) GetError() string {
 	return ""
 }
 
+/////////////////////////
 // path-based configurations
+/////////////////////////
 type FilerConf struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -3047,7 +3122,7 @@ type FilerConf struct {
 func (x *FilerConf) Reset() {
 	*x = FilerConf{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[47]
+		mi := &file_filer_proto_msgTypes[48]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3060,7 +3135,7 @@ func (x *FilerConf) String() string {
 func (*FilerConf) ProtoMessage() {}
 
 func (x *FilerConf) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[47]
+	mi := &file_filer_proto_msgTypes[48]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3073,7 +3148,7 @@ func (x *FilerConf) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FilerConf.ProtoReflect.Descriptor instead.
 func (*FilerConf) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{47}
+	return file_filer_proto_rawDescGZIP(), []int{48}
 }
 
 func (x *FilerConf) GetVersion() int32 {
@@ -3090,6 +3165,9 @@ func (x *FilerConf) GetLocations() []*FilerConf_PathConf {
 	return nil
 }
 
+/////////////////////////
+// Remote Storage related
+/////////////////////////
 type RemoteConf struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -3106,7 +3184,7 @@ type RemoteConf struct {
 func (x *RemoteConf) Reset() {
 	*x = RemoteConf{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[48]
+		mi := &file_filer_proto_msgTypes[49]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3119,7 +3197,7 @@ func (x *RemoteConf) String() string {
 func (*RemoteConf) ProtoMessage() {}
 
 func (x *RemoteConf) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[48]
+	mi := &file_filer_proto_msgTypes[49]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3132,7 +3210,7 @@ func (x *RemoteConf) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use RemoteConf.ProtoReflect.Descriptor instead.
 func (*RemoteConf) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{48}
+	return file_filer_proto_rawDescGZIP(), []int{49}
 }
 
 func (x *RemoteConf) GetType() string {
@@ -3177,18 +3255,16 @@ func (x *RemoteConf) GetS3Endpoint() string {
 	return ""
 }
 
-type Entry_Remote struct {
+type RemoteStorageMapping struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	LastModifiedAt int64  `protobuf:"varint,1,opt,name=last_modified_at,json=lastModifiedAt,proto3" json:"last_modified_at,omitempty"`
-	Size           int64  `protobuf:"varint,2,opt,name=size,proto3" json:"size,omitempty"`
-	ETag           string `protobuf:"bytes,3,opt,name=e_tag,json=eTag,proto3" json:"e_tag,omitempty"`
+	Mappings map[string]*RemoteStorageLocation `protobuf:"bytes,1,rep,name=mappings,proto3" json:"mappings,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
 }
 
-func (x *Entry_Remote) Reset() {
-	*x = Entry_Remote{}
+func (x *RemoteStorageMapping) Reset() {
+	*x = RemoteStorageMapping{}
 	if protoimpl.UnsafeEnabled {
 		mi := &file_filer_proto_msgTypes[50]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
@@ -3196,13 +3272,13 @@ func (x *Entry_Remote) Reset() {
 	}
 }
 
-func (x *Entry_Remote) String() string {
+func (x *RemoteStorageMapping) String() string {
 	return protoimpl.X.MessageStringOf(x)
 }
 
-func (*Entry_Remote) ProtoMessage() {}
+func (*RemoteStorageMapping) ProtoMessage() {}
 
-func (x *Entry_Remote) ProtoReflect() protoreflect.Message {
+func (x *RemoteStorageMapping) ProtoReflect() protoreflect.Message {
 	mi := &file_filer_proto_msgTypes[50]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
@@ -3214,28 +3290,77 @@ func (x *Entry_Remote) ProtoReflect() protoreflect.Message {
 	return mi.MessageOf(x)
 }
 
-// Deprecated: Use Entry_Remote.ProtoReflect.Descriptor instead.
-func (*Entry_Remote) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{4, 1}
+// Deprecated: Use RemoteStorageMapping.ProtoReflect.Descriptor instead.
+func (*RemoteStorageMapping) Descriptor() ([]byte, []int) {
+	return file_filer_proto_rawDescGZIP(), []int{50}
 }
 
-func (x *Entry_Remote) GetLastModifiedAt() int64 {
+func (x *RemoteStorageMapping) GetMappings() map[string]*RemoteStorageLocation {
 	if x != nil {
-		return x.LastModifiedAt
+		return x.Mappings
 	}
-	return 0
+	return nil
 }
 
-func (x *Entry_Remote) GetSize() int64 {
-	if x != nil {
-		return x.Size
+type RemoteStorageLocation struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Name   string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	Bucket string `protobuf:"bytes,2,opt,name=bucket,proto3" json:"bucket,omitempty"`
+	Path   string `protobuf:"bytes,3,opt,name=path,proto3" json:"path,omitempty"`
+}
+
+func (x *RemoteStorageLocation) Reset() {
+	*x = RemoteStorageLocation{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_filer_proto_msgTypes[51]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
 	}
-	return 0
 }
 
-func (x *Entry_Remote) GetETag() string {
+func (x *RemoteStorageLocation) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*RemoteStorageLocation) ProtoMessage() {}
+
+func (x *RemoteStorageLocation) ProtoReflect() protoreflect.Message {
+	mi := &file_filer_proto_msgTypes[51]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use RemoteStorageLocation.ProtoReflect.Descriptor instead.
+func (*RemoteStorageLocation) Descriptor() ([]byte, []int) {
+	return file_filer_proto_rawDescGZIP(), []int{51}
+}
+
+func (x *RemoteStorageLocation) GetName() string {
 	if x != nil {
-		return x.ETag
+		return x.Name
+	}
+	return ""
+}
+
+func (x *RemoteStorageLocation) GetBucket() string {
+	if x != nil {
+		return x.Bucket
+	}
+	return ""
+}
+
+func (x *RemoteStorageLocation) GetPath() string {
+	if x != nil {
+		return x.Path
 	}
 	return ""
 }
@@ -3254,7 +3379,7 @@ type LocateBrokerResponse_Resource struct {
 func (x *LocateBrokerResponse_Resource) Reset() {
 	*x = LocateBrokerResponse_Resource{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[52]
+		mi := &file_filer_proto_msgTypes[54]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3267,7 +3392,7 @@ func (x *LocateBrokerResponse_Resource) String() string {
 func (*LocateBrokerResponse_Resource) ProtoMessage() {}
 
 func (x *LocateBrokerResponse_Resource) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[52]
+	mi := &file_filer_proto_msgTypes[54]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3280,7 +3405,7 @@ func (x *LocateBrokerResponse_Resource) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use LocateBrokerResponse_Resource.ProtoReflect.Descriptor instead.
 func (*LocateBrokerResponse_Resource) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{42, 0}
+	return file_filer_proto_rawDescGZIP(), []int{43, 0}
 }
 
 func (x *LocateBrokerResponse_Resource) GetGrpcAddresses() string {
@@ -3315,7 +3440,7 @@ type FilerConf_PathConf struct {
 func (x *FilerConf_PathConf) Reset() {
 	*x = FilerConf_PathConf{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_filer_proto_msgTypes[53]
+		mi := &file_filer_proto_msgTypes[55]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3328,7 +3453,7 @@ func (x *FilerConf_PathConf) String() string {
 func (*FilerConf_PathConf) ProtoMessage() {}
 
 func (x *FilerConf_PathConf) ProtoReflect() protoreflect.Message {
-	mi := &file_filer_proto_msgTypes[53]
+	mi := &file_filer_proto_msgTypes[55]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3341,7 +3466,7 @@ func (x *FilerConf_PathConf) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FilerConf_PathConf.ProtoReflect.Descriptor instead.
 func (*FilerConf_PathConf) Descriptor() ([]byte, []int) {
-	return file_filer_proto_rawDescGZIP(), []int{47, 0}
+	return file_filer_proto_rawDescGZIP(), []int{48, 0}
 }
 
 func (x *FilerConf_PathConf) GetLocationPrefix() string {
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+	0x65, 0x64, 0x66, 0x73, 0x2f, 0x77, 0x65, 0x65, 0x64, 0x2f, 0x70, 0x62, 0x2f, 0x66, 0x69, 0x6c,
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 }
 
 var (
@@ -3945,129 +4091,134 @@ func file_filer_proto_rawDescGZIP() []byte {
 	return file_filer_proto_rawDescData
 }
 
-var file_filer_proto_msgTypes = make([]protoimpl.MessageInfo, 54)
+var file_filer_proto_msgTypes = make([]protoimpl.MessageInfo, 57)
 var file_filer_proto_goTypes = []interface{}{
 	(*LookupDirectoryEntryRequest)(nil),   // 0: filer_pb.LookupDirectoryEntryRequest
 	(*LookupDirectoryEntryResponse)(nil),  // 1: filer_pb.LookupDirectoryEntryResponse
 	(*ListEntriesRequest)(nil),            // 2: filer_pb.ListEntriesRequest
 	(*ListEntriesResponse)(nil),           // 3: filer_pb.ListEntriesResponse
-	(*Entry)(nil),                         // 4: filer_pb.Entry
-	(*FullEntry)(nil),                     // 5: filer_pb.FullEntry
-	(*EventNotification)(nil),             // 6: filer_pb.EventNotification
-	(*FileChunk)(nil),                     // 7: filer_pb.FileChunk
-	(*FileChunkManifest)(nil),             // 8: filer_pb.FileChunkManifest
-	(*FileId)(nil),                        // 9: filer_pb.FileId
-	(*FuseAttributes)(nil),                // 10: filer_pb.FuseAttributes
-	(*CreateEntryRequest)(nil),            // 11: filer_pb.CreateEntryRequest
-	(*CreateEntryResponse)(nil),           // 12: filer_pb.CreateEntryResponse
-	(*UpdateEntryRequest)(nil),            // 13: filer_pb.UpdateEntryRequest
-	(*UpdateEntryResponse)(nil),           // 14: filer_pb.UpdateEntryResponse
-	(*AppendToEntryRequest)(nil),          // 15: filer_pb.AppendToEntryRequest
-	(*AppendToEntryResponse)(nil),         // 16: filer_pb.AppendToEntryResponse
-	(*DeleteEntryRequest)(nil),            // 17: filer_pb.DeleteEntryRequest
-	(*DeleteEntryResponse)(nil),           // 18: filer_pb.DeleteEntryResponse
-	(*AtomicRenameEntryRequest)(nil),      // 19: filer_pb.AtomicRenameEntryRequest
-	(*AtomicRenameEntryResponse)(nil),     // 20: filer_pb.AtomicRenameEntryResponse
-	(*AssignVolumeRequest)(nil),           // 21: filer_pb.AssignVolumeRequest
-	(*AssignVolumeResponse)(nil),          // 22: filer_pb.AssignVolumeResponse
-	(*LookupVolumeRequest)(nil),           // 23: filer_pb.LookupVolumeRequest
-	(*Locations)(nil),                     // 24: filer_pb.Locations
-	(*Location)(nil),                      // 25: filer_pb.Location
-	(*LookupVolumeResponse)(nil),          // 26: filer_pb.LookupVolumeResponse
-	(*Collection)(nil),                    // 27: filer_pb.Collection
-	(*CollectionListRequest)(nil),         // 28: filer_pb.CollectionListRequest
-	(*CollectionListResponse)(nil),        // 29: filer_pb.CollectionListResponse
-	(*DeleteCollectionRequest)(nil),       // 30: filer_pb.DeleteCollectionRequest
-	(*DeleteCollectionResponse)(nil),      // 31: filer_pb.DeleteCollectionResponse
-	(*StatisticsRequest)(nil),             // 32: filer_pb.StatisticsRequest
-	(*StatisticsResponse)(nil),            // 33: filer_pb.StatisticsResponse
-	(*GetFilerConfigurationRequest)(nil),  // 34: filer_pb.GetFilerConfigurationRequest
-	(*GetFilerConfigurationResponse)(nil), // 35: filer_pb.GetFilerConfigurationResponse
-	(*SubscribeMetadataRequest)(nil),      // 36: filer_pb.SubscribeMetadataRequest
-	(*SubscribeMetadataResponse)(nil),     // 37: filer_pb.SubscribeMetadataResponse
-	(*LogEntry)(nil),                      // 38: filer_pb.LogEntry
-	(*KeepConnectedRequest)(nil),          // 39: filer_pb.KeepConnectedRequest
-	(*KeepConnectedResponse)(nil),         // 40: filer_pb.KeepConnectedResponse
-	(*LocateBrokerRequest)(nil),           // 41: filer_pb.LocateBrokerRequest
-	(*LocateBrokerResponse)(nil),          // 42: filer_pb.LocateBrokerResponse
-	(*KvGetRequest)(nil),                  // 43: filer_pb.KvGetRequest
-	(*KvGetResponse)(nil),                 // 44: filer_pb.KvGetResponse
-	(*KvPutRequest)(nil),                  // 45: filer_pb.KvPutRequest
-	(*KvPutResponse)(nil),                 // 46: filer_pb.KvPutResponse
-	(*FilerConf)(nil),                     // 47: filer_pb.FilerConf
-	(*RemoteConf)(nil),                    // 48: filer_pb.RemoteConf
-	nil,                                   // 49: filer_pb.Entry.ExtendedEntry
-	(*Entry_Remote)(nil),                  // 50: filer_pb.Entry.Remote
-	nil,                                   // 51: filer_pb.LookupVolumeResponse.LocationsMapEntry
-	(*LocateBrokerResponse_Resource)(nil), // 52: filer_pb.LocateBrokerResponse.Resource
-	(*FilerConf_PathConf)(nil),            // 53: filer_pb.FilerConf.PathConf
+	(*RemoteEntry)(nil),                   // 4: filer_pb.RemoteEntry
+	(*Entry)(nil),                         // 5: filer_pb.Entry
+	(*FullEntry)(nil),                     // 6: filer_pb.FullEntry
+	(*EventNotification)(nil),             // 7: filer_pb.EventNotification
+	(*FileChunk)(nil),                     // 8: filer_pb.FileChunk
+	(*FileChunkManifest)(nil),             // 9: filer_pb.FileChunkManifest
+	(*FileId)(nil),                        // 10: filer_pb.FileId
+	(*FuseAttributes)(nil),                // 11: filer_pb.FuseAttributes
+	(*CreateEntryRequest)(nil),            // 12: filer_pb.CreateEntryRequest
+	(*CreateEntryResponse)(nil),           // 13: filer_pb.CreateEntryResponse
+	(*UpdateEntryRequest)(nil),            // 14: filer_pb.UpdateEntryRequest
+	(*UpdateEntryResponse)(nil),           // 15: filer_pb.UpdateEntryResponse
+	(*AppendToEntryRequest)(nil),          // 16: filer_pb.AppendToEntryRequest
+	(*AppendToEntryResponse)(nil),         // 17: filer_pb.AppendToEntryResponse
+	(*DeleteEntryRequest)(nil),            // 18: filer_pb.DeleteEntryRequest
+	(*DeleteEntryResponse)(nil),           // 19: filer_pb.DeleteEntryResponse
+	(*AtomicRenameEntryRequest)(nil),      // 20: filer_pb.AtomicRenameEntryRequest
+	(*AtomicRenameEntryResponse)(nil),     // 21: filer_pb.AtomicRenameEntryResponse
+	(*AssignVolumeRequest)(nil),           // 22: filer_pb.AssignVolumeRequest
+	(*AssignVolumeResponse)(nil),          // 23: filer_pb.AssignVolumeResponse
+	(*LookupVolumeRequest)(nil),           // 24: filer_pb.LookupVolumeRequest
+	(*Locations)(nil),                     // 25: filer_pb.Locations
+	(*Location)(nil),                      // 26: filer_pb.Location
+	(*LookupVolumeResponse)(nil),          // 27: filer_pb.LookupVolumeResponse
+	(*Collection)(nil),                    // 28: filer_pb.Collection
+	(*CollectionListRequest)(nil),         // 29: filer_pb.CollectionListRequest
+	(*CollectionListResponse)(nil),        // 30: filer_pb.CollectionListResponse
+	(*DeleteCollectionRequest)(nil),       // 31: filer_pb.DeleteCollectionRequest
+	(*DeleteCollectionResponse)(nil),      // 32: filer_pb.DeleteCollectionResponse
+	(*StatisticsRequest)(nil),             // 33: filer_pb.StatisticsRequest
+	(*StatisticsResponse)(nil),            // 34: filer_pb.StatisticsResponse
+	(*GetFilerConfigurationRequest)(nil),  // 35: filer_pb.GetFilerConfigurationRequest
+	(*GetFilerConfigurationResponse)(nil), // 36: filer_pb.GetFilerConfigurationResponse
+	(*SubscribeMetadataRequest)(nil),      // 37: filer_pb.SubscribeMetadataRequest
+	(*SubscribeMetadataResponse)(nil),     // 38: filer_pb.SubscribeMetadataResponse
+	(*LogEntry)(nil),                      // 39: filer_pb.LogEntry
+	(*KeepConnectedRequest)(nil),          // 40: filer_pb.KeepConnectedRequest
+	(*KeepConnectedResponse)(nil),         // 41: filer_pb.KeepConnectedResponse
+	(*LocateBrokerRequest)(nil),           // 42: filer_pb.LocateBrokerRequest
+	(*LocateBrokerResponse)(nil),          // 43: filer_pb.LocateBrokerResponse
+	(*KvGetRequest)(nil),                  // 44: filer_pb.KvGetRequest
+	(*KvGetResponse)(nil),                 // 45: filer_pb.KvGetResponse
+	(*KvPutRequest)(nil),                  // 46: filer_pb.KvPutRequest
+	(*KvPutResponse)(nil),                 // 47: filer_pb.KvPutResponse
+	(*FilerConf)(nil),                     // 48: filer_pb.FilerConf
+	(*RemoteConf)(nil),                    // 49: filer_pb.RemoteConf
+	(*RemoteStorageMapping)(nil),          // 50: filer_pb.RemoteStorageMapping
+	(*RemoteStorageLocation)(nil),         // 51: filer_pb.RemoteStorageLocation
+	nil,                                   // 52: filer_pb.Entry.ExtendedEntry
+	nil,                                   // 53: filer_pb.LookupVolumeResponse.LocationsMapEntry
+	(*LocateBrokerResponse_Resource)(nil), // 54: filer_pb.LocateBrokerResponse.Resource
+	(*FilerConf_PathConf)(nil),            // 55: filer_pb.FilerConf.PathConf
+	nil,                                   // 56: filer_pb.RemoteStorageMapping.MappingsEntry
 }
 var file_filer_proto_depIdxs = []int32{
-	4,  // 0: filer_pb.LookupDirectoryEntryResponse.entry:type_name -> filer_pb.Entry
-	4,  // 1: filer_pb.ListEntriesResponse.entry:type_name -> filer_pb.Entry
-	7,  // 2: filer_pb.Entry.chunks:type_name -> filer_pb.FileChunk
-	10, // 3: filer_pb.Entry.attributes:type_name -> filer_pb.FuseAttributes
-	49, // 4: filer_pb.Entry.extended:type_name -> filer_pb.Entry.ExtendedEntry
-	50, // 5: filer_pb.Entry.remote:type_name -> filer_pb.Entry.Remote
-	4,  // 6: filer_pb.FullEntry.entry:type_name -> filer_pb.Entry
-	4,  // 7: filer_pb.EventNotification.old_entry:type_name -> filer_pb.Entry
-	4,  // 8: filer_pb.EventNotification.new_entry:type_name -> filer_pb.Entry
-	9,  // 9: filer_pb.FileChunk.fid:type_name -> filer_pb.FileId
-	9,  // 10: filer_pb.FileChunk.source_fid:type_name -> filer_pb.FileId
-	7,  // 11: filer_pb.FileChunkManifest.chunks:type_name -> filer_pb.FileChunk
-	4,  // 12: filer_pb.CreateEntryRequest.entry:type_name -> filer_pb.Entry
-	4,  // 13: filer_pb.UpdateEntryRequest.entry:type_name -> filer_pb.Entry
-	7,  // 14: filer_pb.AppendToEntryRequest.chunks:type_name -> filer_pb.FileChunk
-	25, // 15: filer_pb.Locations.locations:type_name -> filer_pb.Location
-	51, // 16: filer_pb.LookupVolumeResponse.locations_map:type_name -> filer_pb.LookupVolumeResponse.LocationsMapEntry
-	27, // 17: filer_pb.CollectionListResponse.collections:type_name -> filer_pb.Collection
-	6,  // 18: filer_pb.SubscribeMetadataResponse.event_notification:type_name -> filer_pb.EventNotification
-	52, // 19: filer_pb.LocateBrokerResponse.resources:type_name -> filer_pb.LocateBrokerResponse.Resource
-	53, // 20: filer_pb.FilerConf.locations:type_name -> filer_pb.FilerConf.PathConf
-	24, // 21: filer_pb.LookupVolumeResponse.LocationsMapEntry.value:type_name -> filer_pb.Locations
-	0,  // 22: filer_pb.SeaweedFiler.LookupDirectoryEntry:input_type -> filer_pb.LookupDirectoryEntryRequest
-	2,  // 23: filer_pb.SeaweedFiler.ListEntries:input_type -> filer_pb.ListEntriesRequest
-	11, // 24: filer_pb.SeaweedFiler.CreateEntry:input_type -> filer_pb.CreateEntryRequest
-	13, // 25: filer_pb.SeaweedFiler.UpdateEntry:input_type -> filer_pb.UpdateEntryRequest
-	15, // 26: filer_pb.SeaweedFiler.AppendToEntry:input_type -> filer_pb.AppendToEntryRequest
-	17, // 27: filer_pb.SeaweedFiler.DeleteEntry:input_type -> filer_pb.DeleteEntryRequest
-	19, // 28: filer_pb.SeaweedFiler.AtomicRenameEntry:input_type -> filer_pb.AtomicRenameEntryRequest
-	21, // 29: filer_pb.SeaweedFiler.AssignVolume:input_type -> filer_pb.AssignVolumeRequest
-	23, // 30: filer_pb.SeaweedFiler.LookupVolume:input_type -> filer_pb.LookupVolumeRequest
-	28, // 31: filer_pb.SeaweedFiler.CollectionList:input_type -> filer_pb.CollectionListRequest
-	30, // 32: filer_pb.SeaweedFiler.DeleteCollection:input_type -> filer_pb.DeleteCollectionRequest
-	32, // 33: filer_pb.SeaweedFiler.Statistics:input_type -> filer_pb.StatisticsRequest
-	34, // 34: filer_pb.SeaweedFiler.GetFilerConfiguration:input_type -> filer_pb.GetFilerConfigurationRequest
-	36, // 35: filer_pb.SeaweedFiler.SubscribeMetadata:input_type -> filer_pb.SubscribeMetadataRequest
-	36, // 36: filer_pb.SeaweedFiler.SubscribeLocalMetadata:input_type -> filer_pb.SubscribeMetadataRequest
-	39, // 37: filer_pb.SeaweedFiler.KeepConnected:input_type -> filer_pb.KeepConnectedRequest
-	41, // 38: filer_pb.SeaweedFiler.LocateBroker:input_type -> filer_pb.LocateBrokerRequest
-	43, // 39: filer_pb.SeaweedFiler.KvGet:input_type -> filer_pb.KvGetRequest
-	45, // 40: filer_pb.SeaweedFiler.KvPut:input_type -> filer_pb.KvPutRequest
-	1,  // 41: filer_pb.SeaweedFiler.LookupDirectoryEntry:output_type -> filer_pb.LookupDirectoryEntryResponse
-	3,  // 42: filer_pb.SeaweedFiler.ListEntries:output_type -> filer_pb.ListEntriesResponse
-	12, // 43: filer_pb.SeaweedFiler.CreateEntry:output_type -> filer_pb.CreateEntryResponse
-	14, // 44: filer_pb.SeaweedFiler.UpdateEntry:output_type -> filer_pb.UpdateEntryResponse
-	16, // 45: filer_pb.SeaweedFiler.AppendToEntry:output_type -> filer_pb.AppendToEntryResponse
-	18, // 46: filer_pb.SeaweedFiler.DeleteEntry:output_type -> filer_pb.DeleteEntryResponse
-	20, // 47: filer_pb.SeaweedFiler.AtomicRenameEntry:output_type -> filer_pb.AtomicRenameEntryResponse
-	22, // 48: filer_pb.SeaweedFiler.AssignVolume:output_type -> filer_pb.AssignVolumeResponse
-	26, // 49: filer_pb.SeaweedFiler.LookupVolume:output_type -> filer_pb.LookupVolumeResponse
-	29, // 50: filer_pb.SeaweedFiler.CollectionList:output_type -> filer_pb.CollectionListResponse
-	31, // 51: filer_pb.SeaweedFiler.DeleteCollection:output_type -> filer_pb.DeleteCollectionResponse
-	33, // 52: filer_pb.SeaweedFiler.Statistics:output_type -> filer_pb.StatisticsResponse
-	35, // 53: filer_pb.SeaweedFiler.GetFilerConfiguration:output_type -> filer_pb.GetFilerConfigurationResponse
-	37, // 54: filer_pb.SeaweedFiler.SubscribeMetadata:output_type -> filer_pb.SubscribeMetadataResponse
-	37, // 55: filer_pb.SeaweedFiler.SubscribeLocalMetadata:output_type -> filer_pb.SubscribeMetadataResponse
-	40, // 56: filer_pb.SeaweedFiler.KeepConnected:output_type -> filer_pb.KeepConnectedResponse
-	42, // 57: filer_pb.SeaweedFiler.LocateBroker:output_type -> filer_pb.LocateBrokerResponse
-	44, // 58: filer_pb.SeaweedFiler.KvGet:output_type -> filer_pb.KvGetResponse
-	46, // 59: filer_pb.SeaweedFiler.KvPut:output_type -> filer_pb.KvPutResponse
-	41, // [41:60] is the sub-list for method output_type
-	22, // [22:41] is the sub-list for method input_type
-	22, // [22:22] is the sub-list for extension type_name
-	22, // [22:22] is the sub-list for extension extendee
-	0,  // [0:22] is the sub-list for field type_name
+	5,  // 0: filer_pb.LookupDirectoryEntryResponse.entry:type_name -> filer_pb.Entry
+	5,  // 1: filer_pb.ListEntriesResponse.entry:type_name -> filer_pb.Entry
+	8,  // 2: filer_pb.Entry.chunks:type_name -> filer_pb.FileChunk
+	11, // 3: filer_pb.Entry.attributes:type_name -> filer_pb.FuseAttributes
+	52, // 4: filer_pb.Entry.extended:type_name -> filer_pb.Entry.ExtendedEntry
+	4,  // 5: filer_pb.Entry.remote_entry:type_name -> filer_pb.RemoteEntry
+	5,  // 6: filer_pb.FullEntry.entry:type_name -> filer_pb.Entry
+	5,  // 7: filer_pb.EventNotification.old_entry:type_name -> filer_pb.Entry
+	5,  // 8: filer_pb.EventNotification.new_entry:type_name -> filer_pb.Entry
+	10, // 9: filer_pb.FileChunk.fid:type_name -> filer_pb.FileId
+	10, // 10: filer_pb.FileChunk.source_fid:type_name -> filer_pb.FileId
+	8,  // 11: filer_pb.FileChunkManifest.chunks:type_name -> filer_pb.FileChunk
+	5,  // 12: filer_pb.CreateEntryRequest.entry:type_name -> filer_pb.Entry
+	5,  // 13: filer_pb.UpdateEntryRequest.entry:type_name -> filer_pb.Entry
+	8,  // 14: filer_pb.AppendToEntryRequest.chunks:type_name -> filer_pb.FileChunk
+	26, // 15: filer_pb.Locations.locations:type_name -> filer_pb.Location
+	53, // 16: filer_pb.LookupVolumeResponse.locations_map:type_name -> filer_pb.LookupVolumeResponse.LocationsMapEntry
+	28, // 17: filer_pb.CollectionListResponse.collections:type_name -> filer_pb.Collection
+	7,  // 18: filer_pb.SubscribeMetadataResponse.event_notification:type_name -> filer_pb.EventNotification
+	54, // 19: filer_pb.LocateBrokerResponse.resources:type_name -> filer_pb.LocateBrokerResponse.Resource
+	55, // 20: filer_pb.FilerConf.locations:type_name -> filer_pb.FilerConf.PathConf
+	56, // 21: filer_pb.RemoteStorageMapping.mappings:type_name -> filer_pb.RemoteStorageMapping.MappingsEntry
+	25, // 22: filer_pb.LookupVolumeResponse.LocationsMapEntry.value:type_name -> filer_pb.Locations
+	51, // 23: filer_pb.RemoteStorageMapping.MappingsEntry.value:type_name -> filer_pb.RemoteStorageLocation
+	0,  // 24: filer_pb.SeaweedFiler.LookupDirectoryEntry:input_type -> filer_pb.LookupDirectoryEntryRequest
+	2,  // 25: filer_pb.SeaweedFiler.ListEntries:input_type -> filer_pb.ListEntriesRequest
+	12, // 26: filer_pb.SeaweedFiler.CreateEntry:input_type -> filer_pb.CreateEntryRequest
+	14, // 27: filer_pb.SeaweedFiler.UpdateEntry:input_type -> filer_pb.UpdateEntryRequest
+	16, // 28: filer_pb.SeaweedFiler.AppendToEntry:input_type -> filer_pb.AppendToEntryRequest
+	18, // 29: filer_pb.SeaweedFiler.DeleteEntry:input_type -> filer_pb.DeleteEntryRequest
+	20, // 30: filer_pb.SeaweedFiler.AtomicRenameEntry:input_type -> filer_pb.AtomicRenameEntryRequest
+	22, // 31: filer_pb.SeaweedFiler.AssignVolume:input_type -> filer_pb.AssignVolumeRequest
+	24, // 32: filer_pb.SeaweedFiler.LookupVolume:input_type -> filer_pb.LookupVolumeRequest
+	29, // 33: filer_pb.SeaweedFiler.CollectionList:input_type -> filer_pb.CollectionListRequest
+	31, // 34: filer_pb.SeaweedFiler.DeleteCollection:input_type -> filer_pb.DeleteCollectionRequest
+	33, // 35: filer_pb.SeaweedFiler.Statistics:input_type -> filer_pb.StatisticsRequest
+	35, // 36: filer_pb.SeaweedFiler.GetFilerConfiguration:input_type -> filer_pb.GetFilerConfigurationRequest
+	37, // 37: filer_pb.SeaweedFiler.SubscribeMetadata:input_type -> filer_pb.SubscribeMetadataRequest
+	37, // 38: filer_pb.SeaweedFiler.SubscribeLocalMetadata:input_type -> filer_pb.SubscribeMetadataRequest
+	40, // 39: filer_pb.SeaweedFiler.KeepConnected:input_type -> filer_pb.KeepConnectedRequest
+	42, // 40: filer_pb.SeaweedFiler.LocateBroker:input_type -> filer_pb.LocateBrokerRequest
+	44, // 41: filer_pb.SeaweedFiler.KvGet:input_type -> filer_pb.KvGetRequest
+	46, // 42: filer_pb.SeaweedFiler.KvPut:input_type -> filer_pb.KvPutRequest
+	1,  // 43: filer_pb.SeaweedFiler.LookupDirectoryEntry:output_type -> filer_pb.LookupDirectoryEntryResponse
+	3,  // 44: filer_pb.SeaweedFiler.ListEntries:output_type -> filer_pb.ListEntriesResponse
+	13, // 45: filer_pb.SeaweedFiler.CreateEntry:output_type -> filer_pb.CreateEntryResponse
+	15, // 46: filer_pb.SeaweedFiler.UpdateEntry:output_type -> filer_pb.UpdateEntryResponse
+	17, // 47: filer_pb.SeaweedFiler.AppendToEntry:output_type -> filer_pb.AppendToEntryResponse
+	19, // 48: filer_pb.SeaweedFiler.DeleteEntry:output_type -> filer_pb.DeleteEntryResponse
+	21, // 49: filer_pb.SeaweedFiler.AtomicRenameEntry:output_type -> filer_pb.AtomicRenameEntryResponse
+	23, // 50: filer_pb.SeaweedFiler.AssignVolume:output_type -> filer_pb.AssignVolumeResponse
+	27, // 51: filer_pb.SeaweedFiler.LookupVolume:output_type -> filer_pb.LookupVolumeResponse
+	30, // 52: filer_pb.SeaweedFiler.CollectionList:output_type -> filer_pb.CollectionListResponse
+	32, // 53: filer_pb.SeaweedFiler.DeleteCollection:output_type -> filer_pb.DeleteCollectionResponse
+	34, // 54: filer_pb.SeaweedFiler.Statistics:output_type -> filer_pb.StatisticsResponse
+	36, // 55: filer_pb.SeaweedFiler.GetFilerConfiguration:output_type -> filer_pb.GetFilerConfigurationResponse
+	38, // 56: filer_pb.SeaweedFiler.SubscribeMetadata:output_type -> filer_pb.SubscribeMetadataResponse
+	38, // 57: filer_pb.SeaweedFiler.SubscribeLocalMetadata:output_type -> filer_pb.SubscribeMetadataResponse
+	41, // 58: filer_pb.SeaweedFiler.KeepConnected:output_type -> filer_pb.KeepConnectedResponse
+	43, // 59: filer_pb.SeaweedFiler.LocateBroker:output_type -> filer_pb.LocateBrokerResponse
+	45, // 60: filer_pb.SeaweedFiler.KvGet:output_type -> filer_pb.KvGetResponse
+	47, // 61: filer_pb.SeaweedFiler.KvPut:output_type -> filer_pb.KvPutResponse
+	43, // [43:62] is the sub-list for method output_type
+	24, // [24:43] is the sub-list for method input_type
+	24, // [24:24] is the sub-list for extension type_name
+	24, // [24:24] is the sub-list for extension extendee
+	0,  // [0:24] is the sub-list for field type_name
 }
 
 func init() { file_filer_proto_init() }
@@ -4125,7 +4276,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*Entry); i {
+			switch v := v.(*RemoteEntry); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4137,7 +4288,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*FullEntry); i {
+			switch v := v.(*Entry); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4149,7 +4300,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*EventNotification); i {
+			switch v := v.(*FullEntry); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4161,7 +4312,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*FileChunk); i {
+			switch v := v.(*EventNotification); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4173,7 +4324,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*FileChunkManifest); i {
+			switch v := v.(*FileChunk); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4185,7 +4336,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*FileId); i {
+			switch v := v.(*FileChunkManifest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4197,7 +4348,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[10].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*FuseAttributes); i {
+			switch v := v.(*FileId); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4209,7 +4360,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[11].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*CreateEntryRequest); i {
+			switch v := v.(*FuseAttributes); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4221,7 +4372,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[12].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*CreateEntryResponse); i {
+			switch v := v.(*CreateEntryRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4233,7 +4384,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[13].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*UpdateEntryRequest); i {
+			switch v := v.(*CreateEntryResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4245,7 +4396,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[14].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*UpdateEntryResponse); i {
+			switch v := v.(*UpdateEntryRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4257,7 +4408,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[15].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*AppendToEntryRequest); i {
+			switch v := v.(*UpdateEntryResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4269,7 +4420,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[16].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*AppendToEntryResponse); i {
+			switch v := v.(*AppendToEntryRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4281,7 +4432,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[17].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*DeleteEntryRequest); i {
+			switch v := v.(*AppendToEntryResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4293,7 +4444,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[18].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*DeleteEntryResponse); i {
+			switch v := v.(*DeleteEntryRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4305,7 +4456,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[19].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*AtomicRenameEntryRequest); i {
+			switch v := v.(*DeleteEntryResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4317,7 +4468,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[20].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*AtomicRenameEntryResponse); i {
+			switch v := v.(*AtomicRenameEntryRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4329,7 +4480,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[21].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*AssignVolumeRequest); i {
+			switch v := v.(*AtomicRenameEntryResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4341,7 +4492,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[22].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*AssignVolumeResponse); i {
+			switch v := v.(*AssignVolumeRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4353,7 +4504,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[23].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*LookupVolumeRequest); i {
+			switch v := v.(*AssignVolumeResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4365,7 +4516,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[24].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*Locations); i {
+			switch v := v.(*LookupVolumeRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4377,7 +4528,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[25].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*Location); i {
+			switch v := v.(*Locations); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4389,7 +4540,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[26].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*LookupVolumeResponse); i {
+			switch v := v.(*Location); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4401,7 +4552,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[27].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*Collection); i {
+			switch v := v.(*LookupVolumeResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4413,7 +4564,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[28].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*CollectionListRequest); i {
+			switch v := v.(*Collection); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4425,7 +4576,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[29].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*CollectionListResponse); i {
+			switch v := v.(*CollectionListRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4437,7 +4588,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[30].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*DeleteCollectionRequest); i {
+			switch v := v.(*CollectionListResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4449,7 +4600,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[31].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*DeleteCollectionResponse); i {
+			switch v := v.(*DeleteCollectionRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4461,7 +4612,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[32].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*StatisticsRequest); i {
+			switch v := v.(*DeleteCollectionResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4473,7 +4624,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[33].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*StatisticsResponse); i {
+			switch v := v.(*StatisticsRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4485,7 +4636,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[34].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*GetFilerConfigurationRequest); i {
+			switch v := v.(*StatisticsResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4497,7 +4648,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[35].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*GetFilerConfigurationResponse); i {
+			switch v := v.(*GetFilerConfigurationRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4509,7 +4660,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[36].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*SubscribeMetadataRequest); i {
+			switch v := v.(*GetFilerConfigurationResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4521,7 +4672,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[37].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*SubscribeMetadataResponse); i {
+			switch v := v.(*SubscribeMetadataRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4533,7 +4684,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[38].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*LogEntry); i {
+			switch v := v.(*SubscribeMetadataResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4545,7 +4696,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[39].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*KeepConnectedRequest); i {
+			switch v := v.(*LogEntry); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4557,7 +4708,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[40].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*KeepConnectedResponse); i {
+			switch v := v.(*KeepConnectedRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4569,7 +4720,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[41].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*LocateBrokerRequest); i {
+			switch v := v.(*KeepConnectedResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4581,7 +4732,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[42].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*LocateBrokerResponse); i {
+			switch v := v.(*LocateBrokerRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4593,7 +4744,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[43].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*KvGetRequest); i {
+			switch v := v.(*LocateBrokerResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4605,7 +4756,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[44].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*KvGetResponse); i {
+			switch v := v.(*KvGetRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4617,7 +4768,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[45].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*KvPutRequest); i {
+			switch v := v.(*KvGetResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4629,7 +4780,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[46].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*KvPutResponse); i {
+			switch v := v.(*KvPutRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4641,7 +4792,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[47].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*FilerConf); i {
+			switch v := v.(*KvPutResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4653,6 +4804,18 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[48].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*FilerConf); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_filer_proto_msgTypes[49].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*RemoteConf); i {
 			case 0:
 				return &v.state
@@ -4665,7 +4828,7 @@ func file_filer_proto_init() {
 			}
 		}
 		file_filer_proto_msgTypes[50].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*Entry_Remote); i {
+			switch v := v.(*RemoteStorageMapping); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4676,7 +4839,19 @@ func file_filer_proto_init() {
 				return nil
 			}
 		}
-		file_filer_proto_msgTypes[52].Exporter = func(v interface{}, i int) interface{} {
+		file_filer_proto_msgTypes[51].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*RemoteStorageLocation); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_filer_proto_msgTypes[54].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*LocateBrokerResponse_Resource); i {
 			case 0:
 				return &v.state
@@ -4688,7 +4863,7 @@ func file_filer_proto_init() {
 				return nil
 			}
 		}
-		file_filer_proto_msgTypes[53].Exporter = func(v interface{}, i int) interface{} {
+		file_filer_proto_msgTypes[55].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*FilerConf_PathConf); i {
 			case 0:
 				return &v.state
@@ -4707,7 +4882,7 @@ func file_filer_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_filer_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   54,
+			NumMessages:   57,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
diff --git a/weed/pb/filer_pb/filer_pb_helper.go b/weed/pb/filer_pb/filer_pb_helper.go
index b46385c8f..ae282db75 100644
--- a/weed/pb/filer_pb/filer_pb_helper.go
+++ b/weed/pb/filer_pb/filer_pb_helper.go
@@ -147,3 +147,7 @@ func (fp *FilerConf_PathConf) Key() interface{} {
 	key, _ := proto.Marshal(fp)
 	return string(key)
 }
+func (fp *RemoteStorageLocation) Key() interface{} {
+	key, _ := proto.Marshal(fp)
+	return string(key)
+}
diff --git a/weed/pb/filer_pb_tail.go b/weed/pb/filer_pb_tail.go
new file mode 100644
index 000000000..31fb62fb3
--- /dev/null
+++ b/weed/pb/filer_pb_tail.go
@@ -0,0 +1,94 @@
+package pb
+
+import (
+	"context"
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"google.golang.org/grpc"
+	"io"
+	"time"
+)
+
+type ProcessMetadataFunc func(resp *filer_pb.SubscribeMetadataResponse) error
+
+func FollowMetadata(filerAddress string, grpcDialOption grpc.DialOption,
+	clientName string, pathPrefix string, lastTsNs int64, selfSignature int32,
+	processEventFn ProcessMetadataFunc, fatalOnError bool) error {
+
+	err := WithFilerClient(filerAddress, grpcDialOption, makeFunc(
+		clientName, pathPrefix, lastTsNs, selfSignature, processEventFn, fatalOnError))
+	if err != nil {
+		return fmt.Errorf("subscribing filer meta change: %v", err)
+	}
+	return err
+}
+
+func WithFilerClientFollowMetadata(filerClient filer_pb.FilerClient,
+	clientName string, pathPrefix string, lastTsNs int64, selfSignature int32,
+	processEventFn ProcessMetadataFunc, fatalOnError bool) error {
+
+	err := filerClient.WithFilerClient(makeFunc(
+		clientName, pathPrefix, lastTsNs, selfSignature, processEventFn, fatalOnError))
+	if err != nil {
+		return fmt.Errorf("subscribing filer meta change: %v", err)
+	}
+
+	return nil
+}
+
+func makeFunc(clientName string, pathPrefix string, lastTsNs int64, selfSignature int32,
+	processEventFn ProcessMetadataFunc, fatalOnError bool) func(client filer_pb.SeaweedFilerClient) error {
+	return func(client filer_pb.SeaweedFilerClient) error {
+		ctx, cancel := context.WithCancel(context.Background())
+		defer cancel()
+		stream, err := client.SubscribeMetadata(ctx, &filer_pb.SubscribeMetadataRequest{
+			ClientName: clientName,
+			PathPrefix: pathPrefix,
+			SinceNs:    lastTsNs,
+			Signature:  selfSignature,
+		})
+		if err != nil {
+			return fmt.Errorf("subscribe: %v", err)
+		}
+
+		for {
+			resp, listenErr := stream.Recv()
+			if listenErr == io.EOF {
+				return nil
+			}
+			if listenErr != nil {
+				return listenErr
+			}
+
+			if err := processEventFn(resp); err != nil {
+				if fatalOnError {
+					glog.Fatalf("process %v: %v", resp, err)
+				} else {
+					glog.Errorf("process %v: %v", resp, err)
+				}
+			}
+			lastTsNs = resp.TsNs
+		}
+	}
+}
+
+func AddOffsetFunc(processEventFn ProcessMetadataFunc, offsetInterval time.Duration, offsetFunc func(counter int64, offset int64) error) ProcessMetadataFunc {
+	var counter int64
+	var lastWriteTime time.Time
+	return func(resp *filer_pb.SubscribeMetadataResponse) error {
+		if err := processEventFn(resp); err != nil {
+			return err
+		}
+		counter++
+		if lastWriteTime.Add(offsetInterval).Before(time.Now()) {
+			counter = 0
+			lastWriteTime = time.Now()
+			if err := offsetFunc(counter, resp.TsNs); err != nil {
+				return err
+			}
+		}
+		return nil
+	}
+
+}
diff --git a/weed/pb/volume_server.proto b/weed/pb/volume_server.proto
index f9836c402..b1f2487ba 100644
--- a/weed/pb/volume_server.proto
+++ b/weed/pb/volume_server.proto
@@ -93,6 +93,10 @@ service VolumeServer {
     rpc VolumeServerLeave (VolumeServerLeaveRequest) returns (VolumeServerLeaveResponse) {
     }
 
+    // remote storage
+    rpc FetchAndWriteNeedle (FetchAndWriteNeedleRequest) returns (FetchAndWriteNeedleResponse) {
+    }
+
     // <experimental> query
     rpc Query (QueryRequest) returns (stream QueriedStripe) {
     }
@@ -426,6 +430,7 @@ message VolumeInfo {
     string replication = 3;
 }
 
+// tiered storage
 message VolumeTierMoveDatToRemoteRequest {
     uint32 volume_id = 1;
     string collection = 2;
@@ -460,6 +465,25 @@ message VolumeServerLeaveRequest {
 message VolumeServerLeaveResponse {
 }
 
+// remote storage
+message FetchAndWriteNeedleRequest {
+    uint32 volume_id = 1;
+    uint64 needle_id = 2;
+    int64 offset = 3;
+    int64 size = 4;
+    // remote conf
+    string remote_type = 5;
+    string remote_name = 6;
+    string s3_access_key = 8;
+    string s3_secret_key = 9;
+    string s3_region = 10;
+    string s3_endpoint = 11;
+    string remote_bucket = 12;
+    string remote_key = 13;
+}
+message FetchAndWriteNeedleResponse {
+}
+
 // select on volume servers
 message QueryRequest {
     repeated string selections = 1;
diff --git a/weed/pb/volume_server_pb/volume_server.pb.go b/weed/pb/volume_server_pb/volume_server.pb.go
index c642142ba..b360349e4 100644
--- a/weed/pb/volume_server_pb/volume_server.pb.go
+++ b/weed/pb/volume_server_pb/volume_server.pb.go
@@ -3901,6 +3901,7 @@ func (x *VolumeInfo) GetReplication() string {
 	return ""
 }
 
+// tiered storage
 type VolumeTierMoveDatToRemoteRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -4314,6 +4315,181 @@ func (*VolumeServerLeaveResponse) Descriptor() ([]byte, []int) {
 	return file_volume_server_proto_rawDescGZIP(), []int{77}
 }
 
+// remote storage
+type FetchAndWriteNeedleRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	VolumeId uint32 `protobuf:"varint,1,opt,name=volume_id,json=volumeId,proto3" json:"volume_id,omitempty"`
+	NeedleId uint64 `protobuf:"varint,2,opt,name=needle_id,json=needleId,proto3" json:"needle_id,omitempty"`
+	Offset   int64  `protobuf:"varint,3,opt,name=offset,proto3" json:"offset,omitempty"`
+	Size     int64  `protobuf:"varint,4,opt,name=size,proto3" json:"size,omitempty"`
+	// remote conf
+	RemoteType   string `protobuf:"bytes,5,opt,name=remote_type,json=remoteType,proto3" json:"remote_type,omitempty"`
+	RemoteName   string `protobuf:"bytes,6,opt,name=remote_name,json=remoteName,proto3" json:"remote_name,omitempty"`
+	S3AccessKey  string `protobuf:"bytes,8,opt,name=s3_access_key,json=s3AccessKey,proto3" json:"s3_access_key,omitempty"`
+	S3SecretKey  string `protobuf:"bytes,9,opt,name=s3_secret_key,json=s3SecretKey,proto3" json:"s3_secret_key,omitempty"`
+	S3Region     string `protobuf:"bytes,10,opt,name=s3_region,json=s3Region,proto3" json:"s3_region,omitempty"`
+	S3Endpoint   string `protobuf:"bytes,11,opt,name=s3_endpoint,json=s3Endpoint,proto3" json:"s3_endpoint,omitempty"`
+	RemoteBucket string `protobuf:"bytes,12,opt,name=remote_bucket,json=remoteBucket,proto3" json:"remote_bucket,omitempty"`
+	RemoteKey    string `protobuf:"bytes,13,opt,name=remote_key,json=remoteKey,proto3" json:"remote_key,omitempty"`
+}
+
+func (x *FetchAndWriteNeedleRequest) Reset() {
+	*x = FetchAndWriteNeedleRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_volume_server_proto_msgTypes[78]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *FetchAndWriteNeedleRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*FetchAndWriteNeedleRequest) ProtoMessage() {}
+
+func (x *FetchAndWriteNeedleRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_volume_server_proto_msgTypes[78]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use FetchAndWriteNeedleRequest.ProtoReflect.Descriptor instead.
+func (*FetchAndWriteNeedleRequest) Descriptor() ([]byte, []int) {
+	return file_volume_server_proto_rawDescGZIP(), []int{78}
+}
+
+func (x *FetchAndWriteNeedleRequest) GetVolumeId() uint32 {
+	if x != nil {
+		return x.VolumeId
+	}
+	return 0
+}
+
+func (x *FetchAndWriteNeedleRequest) GetNeedleId() uint64 {
+	if x != nil {
+		return x.NeedleId
+	}
+	return 0
+}
+
+func (x *FetchAndWriteNeedleRequest) GetOffset() int64 {
+	if x != nil {
+		return x.Offset
+	}
+	return 0
+}
+
+func (x *FetchAndWriteNeedleRequest) GetSize() int64 {
+	if x != nil {
+		return x.Size
+	}
+	return 0
+}
+
+func (x *FetchAndWriteNeedleRequest) GetRemoteType() string {
+	if x != nil {
+		return x.RemoteType
+	}
+	return ""
+}
+
+func (x *FetchAndWriteNeedleRequest) GetRemoteName() string {
+	if x != nil {
+		return x.RemoteName
+	}
+	return ""
+}
+
+func (x *FetchAndWriteNeedleRequest) GetS3AccessKey() string {
+	if x != nil {
+		return x.S3AccessKey
+	}
+	return ""
+}
+
+func (x *FetchAndWriteNeedleRequest) GetS3SecretKey() string {
+	if x != nil {
+		return x.S3SecretKey
+	}
+	return ""
+}
+
+func (x *FetchAndWriteNeedleRequest) GetS3Region() string {
+	if x != nil {
+		return x.S3Region
+	}
+	return ""
+}
+
+func (x *FetchAndWriteNeedleRequest) GetS3Endpoint() string {
+	if x != nil {
+		return x.S3Endpoint
+	}
+	return ""
+}
+
+func (x *FetchAndWriteNeedleRequest) GetRemoteBucket() string {
+	if x != nil {
+		return x.RemoteBucket
+	}
+	return ""
+}
+
+func (x *FetchAndWriteNeedleRequest) GetRemoteKey() string {
+	if x != nil {
+		return x.RemoteKey
+	}
+	return ""
+}
+
+type FetchAndWriteNeedleResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+}
+
+func (x *FetchAndWriteNeedleResponse) Reset() {
+	*x = FetchAndWriteNeedleResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_volume_server_proto_msgTypes[79]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *FetchAndWriteNeedleResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*FetchAndWriteNeedleResponse) ProtoMessage() {}
+
+func (x *FetchAndWriteNeedleResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_volume_server_proto_msgTypes[79]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use FetchAndWriteNeedleResponse.ProtoReflect.Descriptor instead.
+func (*FetchAndWriteNeedleResponse) Descriptor() ([]byte, []int) {
+	return file_volume_server_proto_rawDescGZIP(), []int{79}
+}
+
 // select on volume servers
 type QueryRequest struct {
 	state         protoimpl.MessageState
@@ -4330,7 +4506,7 @@ type QueryRequest struct {
 func (x *QueryRequest) Reset() {
 	*x = QueryRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[78]
+		mi := &file_volume_server_proto_msgTypes[80]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4343,7 +4519,7 @@ func (x *QueryRequest) String() string {
 func (*QueryRequest) ProtoMessage() {}
 
 func (x *QueryRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[78]
+	mi := &file_volume_server_proto_msgTypes[80]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4356,7 +4532,7 @@ func (x *QueryRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryRequest.ProtoReflect.Descriptor instead.
 func (*QueryRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{78}
+	return file_volume_server_proto_rawDescGZIP(), []int{80}
 }
 
 func (x *QueryRequest) GetSelections() []string {
@@ -4405,7 +4581,7 @@ type QueriedStripe struct {
 func (x *QueriedStripe) Reset() {
 	*x = QueriedStripe{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[79]
+		mi := &file_volume_server_proto_msgTypes[81]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4418,7 +4594,7 @@ func (x *QueriedStripe) String() string {
 func (*QueriedStripe) ProtoMessage() {}
 
 func (x *QueriedStripe) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[79]
+	mi := &file_volume_server_proto_msgTypes[81]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4431,7 +4607,7 @@ func (x *QueriedStripe) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueriedStripe.ProtoReflect.Descriptor instead.
 func (*QueriedStripe) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{79}
+	return file_volume_server_proto_rawDescGZIP(), []int{81}
 }
 
 func (x *QueriedStripe) GetRecords() []byte {
@@ -4453,7 +4629,7 @@ type VolumeNeedleStatusRequest struct {
 func (x *VolumeNeedleStatusRequest) Reset() {
 	*x = VolumeNeedleStatusRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[80]
+		mi := &file_volume_server_proto_msgTypes[82]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4466,7 +4642,7 @@ func (x *VolumeNeedleStatusRequest) String() string {
 func (*VolumeNeedleStatusRequest) ProtoMessage() {}
 
 func (x *VolumeNeedleStatusRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[80]
+	mi := &file_volume_server_proto_msgTypes[82]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4479,7 +4655,7 @@ func (x *VolumeNeedleStatusRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeNeedleStatusRequest.ProtoReflect.Descriptor instead.
 func (*VolumeNeedleStatusRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{80}
+	return file_volume_server_proto_rawDescGZIP(), []int{82}
 }
 
 func (x *VolumeNeedleStatusRequest) GetVolumeId() uint32 {
@@ -4512,7 +4688,7 @@ type VolumeNeedleStatusResponse struct {
 func (x *VolumeNeedleStatusResponse) Reset() {
 	*x = VolumeNeedleStatusResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[81]
+		mi := &file_volume_server_proto_msgTypes[83]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4525,7 +4701,7 @@ func (x *VolumeNeedleStatusResponse) String() string {
 func (*VolumeNeedleStatusResponse) ProtoMessage() {}
 
 func (x *VolumeNeedleStatusResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[81]
+	mi := &file_volume_server_proto_msgTypes[83]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4538,7 +4714,7 @@ func (x *VolumeNeedleStatusResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeNeedleStatusResponse.ProtoReflect.Descriptor instead.
 func (*VolumeNeedleStatusResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{81}
+	return file_volume_server_proto_rawDescGZIP(), []int{83}
 }
 
 func (x *VolumeNeedleStatusResponse) GetNeedleId() uint64 {
@@ -4596,7 +4772,7 @@ type QueryRequest_Filter struct {
 func (x *QueryRequest_Filter) Reset() {
 	*x = QueryRequest_Filter{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[82]
+		mi := &file_volume_server_proto_msgTypes[84]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4609,7 +4785,7 @@ func (x *QueryRequest_Filter) String() string {
 func (*QueryRequest_Filter) ProtoMessage() {}
 
 func (x *QueryRequest_Filter) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[82]
+	mi := &file_volume_server_proto_msgTypes[84]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4622,7 +4798,7 @@ func (x *QueryRequest_Filter) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryRequest_Filter.ProtoReflect.Descriptor instead.
 func (*QueryRequest_Filter) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{78, 0}
+	return file_volume_server_proto_rawDescGZIP(), []int{80, 0}
 }
 
 func (x *QueryRequest_Filter) GetField() string {
@@ -4661,7 +4837,7 @@ type QueryRequest_InputSerialization struct {
 func (x *QueryRequest_InputSerialization) Reset() {
 	*x = QueryRequest_InputSerialization{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[83]
+		mi := &file_volume_server_proto_msgTypes[85]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4674,7 +4850,7 @@ func (x *QueryRequest_InputSerialization) String() string {
 func (*QueryRequest_InputSerialization) ProtoMessage() {}
 
 func (x *QueryRequest_InputSerialization) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[83]
+	mi := &file_volume_server_proto_msgTypes[85]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4687,7 +4863,7 @@ func (x *QueryRequest_InputSerialization) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryRequest_InputSerialization.ProtoReflect.Descriptor instead.
 func (*QueryRequest_InputSerialization) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{78, 1}
+	return file_volume_server_proto_rawDescGZIP(), []int{80, 1}
 }
 
 func (x *QueryRequest_InputSerialization) GetCompressionType() string {
@@ -4730,7 +4906,7 @@ type QueryRequest_OutputSerialization struct {
 func (x *QueryRequest_OutputSerialization) Reset() {
 	*x = QueryRequest_OutputSerialization{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[84]
+		mi := &file_volume_server_proto_msgTypes[86]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4743,7 +4919,7 @@ func (x *QueryRequest_OutputSerialization) String() string {
 func (*QueryRequest_OutputSerialization) ProtoMessage() {}
 
 func (x *QueryRequest_OutputSerialization) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[84]
+	mi := &file_volume_server_proto_msgTypes[86]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4756,7 +4932,7 @@ func (x *QueryRequest_OutputSerialization) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryRequest_OutputSerialization.ProtoReflect.Descriptor instead.
 func (*QueryRequest_OutputSerialization) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{78, 2}
+	return file_volume_server_proto_rawDescGZIP(), []int{80, 2}
 }
 
 func (x *QueryRequest_OutputSerialization) GetCsvOutput() *QueryRequest_OutputSerialization_CSVOutput {
@@ -4791,7 +4967,7 @@ type QueryRequest_InputSerialization_CSVInput struct {
 func (x *QueryRequest_InputSerialization_CSVInput) Reset() {
 	*x = QueryRequest_InputSerialization_CSVInput{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[85]
+		mi := &file_volume_server_proto_msgTypes[87]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4804,7 +4980,7 @@ func (x *QueryRequest_InputSerialization_CSVInput) String() string {
 func (*QueryRequest_InputSerialization_CSVInput) ProtoMessage() {}
 
 func (x *QueryRequest_InputSerialization_CSVInput) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[85]
+	mi := &file_volume_server_proto_msgTypes[87]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4817,7 +4993,7 @@ func (x *QueryRequest_InputSerialization_CSVInput) ProtoReflect() protoreflect.M
 
 // Deprecated: Use QueryRequest_InputSerialization_CSVInput.ProtoReflect.Descriptor instead.
 func (*QueryRequest_InputSerialization_CSVInput) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{78, 1, 0}
+	return file_volume_server_proto_rawDescGZIP(), []int{80, 1, 0}
 }
 
 func (x *QueryRequest_InputSerialization_CSVInput) GetFileHeaderInfo() string {
@@ -4880,7 +5056,7 @@ type QueryRequest_InputSerialization_JSONInput struct {
 func (x *QueryRequest_InputSerialization_JSONInput) Reset() {
 	*x = QueryRequest_InputSerialization_JSONInput{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[86]
+		mi := &file_volume_server_proto_msgTypes[88]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4893,7 +5069,7 @@ func (x *QueryRequest_InputSerialization_JSONInput) String() string {
 func (*QueryRequest_InputSerialization_JSONInput) ProtoMessage() {}
 
 func (x *QueryRequest_InputSerialization_JSONInput) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[86]
+	mi := &file_volume_server_proto_msgTypes[88]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4906,7 +5082,7 @@ func (x *QueryRequest_InputSerialization_JSONInput) ProtoReflect() protoreflect.
 
 // Deprecated: Use QueryRequest_InputSerialization_JSONInput.ProtoReflect.Descriptor instead.
 func (*QueryRequest_InputSerialization_JSONInput) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{78, 1, 1}
+	return file_volume_server_proto_rawDescGZIP(), []int{80, 1, 1}
 }
 
 func (x *QueryRequest_InputSerialization_JSONInput) GetType() string {
@@ -4925,7 +5101,7 @@ type QueryRequest_InputSerialization_ParquetInput struct {
 func (x *QueryRequest_InputSerialization_ParquetInput) Reset() {
 	*x = QueryRequest_InputSerialization_ParquetInput{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[87]
+		mi := &file_volume_server_proto_msgTypes[89]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4938,7 +5114,7 @@ func (x *QueryRequest_InputSerialization_ParquetInput) String() string {
 func (*QueryRequest_InputSerialization_ParquetInput) ProtoMessage() {}
 
 func (x *QueryRequest_InputSerialization_ParquetInput) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[87]
+	mi := &file_volume_server_proto_msgTypes[89]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4951,7 +5127,7 @@ func (x *QueryRequest_InputSerialization_ParquetInput) ProtoReflect() protorefle
 
 // Deprecated: Use QueryRequest_InputSerialization_ParquetInput.ProtoReflect.Descriptor instead.
 func (*QueryRequest_InputSerialization_ParquetInput) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{78, 1, 2}
+	return file_volume_server_proto_rawDescGZIP(), []int{80, 1, 2}
 }
 
 type QueryRequest_OutputSerialization_CSVOutput struct {
@@ -4969,7 +5145,7 @@ type QueryRequest_OutputSerialization_CSVOutput struct {
 func (x *QueryRequest_OutputSerialization_CSVOutput) Reset() {
 	*x = QueryRequest_OutputSerialization_CSVOutput{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[88]
+		mi := &file_volume_server_proto_msgTypes[90]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4982,7 +5158,7 @@ func (x *QueryRequest_OutputSerialization_CSVOutput) String() string {
 func (*QueryRequest_OutputSerialization_CSVOutput) ProtoMessage() {}
 
 func (x *QueryRequest_OutputSerialization_CSVOutput) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[88]
+	mi := &file_volume_server_proto_msgTypes[90]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4995,7 +5171,7 @@ func (x *QueryRequest_OutputSerialization_CSVOutput) ProtoReflect() protoreflect
 
 // Deprecated: Use QueryRequest_OutputSerialization_CSVOutput.ProtoReflect.Descriptor instead.
 func (*QueryRequest_OutputSerialization_CSVOutput) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{78, 2, 0}
+	return file_volume_server_proto_rawDescGZIP(), []int{80, 2, 0}
 }
 
 func (x *QueryRequest_OutputSerialization_CSVOutput) GetQuoteFields() string {
@@ -5044,7 +5220,7 @@ type QueryRequest_OutputSerialization_JSONOutput struct {
 func (x *QueryRequest_OutputSerialization_JSONOutput) Reset() {
 	*x = QueryRequest_OutputSerialization_JSONOutput{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[89]
+		mi := &file_volume_server_proto_msgTypes[91]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -5057,7 +5233,7 @@ func (x *QueryRequest_OutputSerialization_JSONOutput) String() string {
 func (*QueryRequest_OutputSerialization_JSONOutput) ProtoMessage() {}
 
 func (x *QueryRequest_OutputSerialization_JSONOutput) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[89]
+	mi := &file_volume_server_proto_msgTypes[91]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -5070,7 +5246,7 @@ func (x *QueryRequest_OutputSerialization_JSONOutput) ProtoReflect() protoreflec
 
 // Deprecated: Use QueryRequest_OutputSerialization_JSONOutput.ProtoReflect.Descriptor instead.
 func (*QueryRequest_OutputSerialization_JSONOutput) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{78, 2, 1}
+	return file_volume_server_proto_rawDescGZIP(), []int{80, 2, 1}
 }
 
 func (x *QueryRequest_OutputSerialization_JSONOutput) GetRecordDelimiter() string {
@@ -5539,6 +5715,33 @@ var file_volume_server_proto_rawDesc = []byte{
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@@ -5662,7 +5865,7 @@ var file_volume_server_proto_rawDesc = []byte{
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@@ -5916,24 +6119,31 @@ var file_volume_server_proto_rawDesc = []byte{
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 }
 
 var (
@@ -5948,7 +6158,7 @@ func file_volume_server_proto_rawDescGZIP() []byte {
 	return file_volume_server_proto_rawDescData
 }
 
-var file_volume_server_proto_msgTypes = make([]protoimpl.MessageInfo, 90)
+var file_volume_server_proto_msgTypes = make([]protoimpl.MessageInfo, 92)
 var file_volume_server_proto_goTypes = []interface{}{
 	(*BatchDeleteRequest)(nil),                           // 0: volume_server_pb.BatchDeleteRequest
 	(*BatchDeleteResponse)(nil),                          // 1: volume_server_pb.BatchDeleteResponse
@@ -6028,32 +6238,34 @@ var file_volume_server_proto_goTypes = []interface{}{
 	(*VolumeServerStatusResponse)(nil),                   // 75: volume_server_pb.VolumeServerStatusResponse
 	(*VolumeServerLeaveRequest)(nil),                     // 76: volume_server_pb.VolumeServerLeaveRequest
 	(*VolumeServerLeaveResponse)(nil),                    // 77: volume_server_pb.VolumeServerLeaveResponse
-	(*QueryRequest)(nil),                                 // 78: volume_server_pb.QueryRequest
-	(*QueriedStripe)(nil),                                // 79: volume_server_pb.QueriedStripe
-	(*VolumeNeedleStatusRequest)(nil),                    // 80: volume_server_pb.VolumeNeedleStatusRequest
-	(*VolumeNeedleStatusResponse)(nil),                   // 81: volume_server_pb.VolumeNeedleStatusResponse
-	(*QueryRequest_Filter)(nil),                          // 82: volume_server_pb.QueryRequest.Filter
-	(*QueryRequest_InputSerialization)(nil),              // 83: volume_server_pb.QueryRequest.InputSerialization
-	(*QueryRequest_OutputSerialization)(nil),             // 84: volume_server_pb.QueryRequest.OutputSerialization
-	(*QueryRequest_InputSerialization_CSVInput)(nil),     // 85: volume_server_pb.QueryRequest.InputSerialization.CSVInput
-	(*QueryRequest_InputSerialization_JSONInput)(nil),    // 86: volume_server_pb.QueryRequest.InputSerialization.JSONInput
-	(*QueryRequest_InputSerialization_ParquetInput)(nil), // 87: volume_server_pb.QueryRequest.InputSerialization.ParquetInput
-	(*QueryRequest_OutputSerialization_CSVOutput)(nil),   // 88: volume_server_pb.QueryRequest.OutputSerialization.CSVOutput
-	(*QueryRequest_OutputSerialization_JSONOutput)(nil),  // 89: volume_server_pb.QueryRequest.OutputSerialization.JSONOutput
+	(*FetchAndWriteNeedleRequest)(nil),                   // 78: volume_server_pb.FetchAndWriteNeedleRequest
+	(*FetchAndWriteNeedleResponse)(nil),                  // 79: volume_server_pb.FetchAndWriteNeedleResponse
+	(*QueryRequest)(nil),                                 // 80: volume_server_pb.QueryRequest
+	(*QueriedStripe)(nil),                                // 81: volume_server_pb.QueriedStripe
+	(*VolumeNeedleStatusRequest)(nil),                    // 82: volume_server_pb.VolumeNeedleStatusRequest
+	(*VolumeNeedleStatusResponse)(nil),                   // 83: volume_server_pb.VolumeNeedleStatusResponse
+	(*QueryRequest_Filter)(nil),                          // 84: volume_server_pb.QueryRequest.Filter
+	(*QueryRequest_InputSerialization)(nil),              // 85: volume_server_pb.QueryRequest.InputSerialization
+	(*QueryRequest_OutputSerialization)(nil),             // 86: volume_server_pb.QueryRequest.OutputSerialization
+	(*QueryRequest_InputSerialization_CSVInput)(nil),     // 87: volume_server_pb.QueryRequest.InputSerialization.CSVInput
+	(*QueryRequest_InputSerialization_JSONInput)(nil),    // 88: volume_server_pb.QueryRequest.InputSerialization.JSONInput
+	(*QueryRequest_InputSerialization_ParquetInput)(nil), // 89: volume_server_pb.QueryRequest.InputSerialization.ParquetInput
+	(*QueryRequest_OutputSerialization_CSVOutput)(nil),   // 90: volume_server_pb.QueryRequest.OutputSerialization.CSVOutput
+	(*QueryRequest_OutputSerialization_JSONOutput)(nil),  // 91: volume_server_pb.QueryRequest.OutputSerialization.JSONOutput
 }
 var file_volume_server_proto_depIdxs = []int32{
 	2,  // 0: volume_server_pb.BatchDeleteResponse.results:type_name -> volume_server_pb.DeleteResult
 	68, // 1: volume_server_pb.VolumeInfo.files:type_name -> volume_server_pb.RemoteFile
 	66, // 2: volume_server_pb.VolumeServerStatusResponse.disk_statuses:type_name -> volume_server_pb.DiskStatus
 	67, // 3: volume_server_pb.VolumeServerStatusResponse.memory_status:type_name -> volume_server_pb.MemStatus
-	82, // 4: volume_server_pb.QueryRequest.filter:type_name -> volume_server_pb.QueryRequest.Filter
-	83, // 5: volume_server_pb.QueryRequest.input_serialization:type_name -> volume_server_pb.QueryRequest.InputSerialization
-	84, // 6: volume_server_pb.QueryRequest.output_serialization:type_name -> volume_server_pb.QueryRequest.OutputSerialization
-	85, // 7: volume_server_pb.QueryRequest.InputSerialization.csv_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.CSVInput
-	86, // 8: volume_server_pb.QueryRequest.InputSerialization.json_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.JSONInput
-	87, // 9: volume_server_pb.QueryRequest.InputSerialization.parquet_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.ParquetInput
-	88, // 10: volume_server_pb.QueryRequest.OutputSerialization.csv_output:type_name -> volume_server_pb.QueryRequest.OutputSerialization.CSVOutput
-	89, // 11: volume_server_pb.QueryRequest.OutputSerialization.json_output:type_name -> volume_server_pb.QueryRequest.OutputSerialization.JSONOutput
+	84, // 4: volume_server_pb.QueryRequest.filter:type_name -> volume_server_pb.QueryRequest.Filter
+	85, // 5: volume_server_pb.QueryRequest.input_serialization:type_name -> volume_server_pb.QueryRequest.InputSerialization
+	86, // 6: volume_server_pb.QueryRequest.output_serialization:type_name -> volume_server_pb.QueryRequest.OutputSerialization
+	87, // 7: volume_server_pb.QueryRequest.InputSerialization.csv_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.CSVInput
+	88, // 8: volume_server_pb.QueryRequest.InputSerialization.json_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.JSONInput
+	89, // 9: volume_server_pb.QueryRequest.InputSerialization.parquet_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.ParquetInput
+	90, // 10: volume_server_pb.QueryRequest.OutputSerialization.csv_output:type_name -> volume_server_pb.QueryRequest.OutputSerialization.CSVOutput
+	91, // 11: volume_server_pb.QueryRequest.OutputSerialization.json_output:type_name -> volume_server_pb.QueryRequest.OutputSerialization.JSONOutput
 	0,  // 12: volume_server_pb.VolumeServer.BatchDelete:input_type -> volume_server_pb.BatchDeleteRequest
 	4,  // 13: volume_server_pb.VolumeServer.VacuumVolumeCheck:input_type -> volume_server_pb.VacuumVolumeCheckRequest
 	6,  // 14: volume_server_pb.VolumeServer.VacuumVolumeCompact:input_type -> volume_server_pb.VacuumVolumeCompactRequest
@@ -6090,48 +6302,50 @@ var file_volume_server_proto_depIdxs = []int32{
 	72, // 45: volume_server_pb.VolumeServer.VolumeTierMoveDatFromRemote:input_type -> volume_server_pb.VolumeTierMoveDatFromRemoteRequest
 	74, // 46: volume_server_pb.VolumeServer.VolumeServerStatus:input_type -> volume_server_pb.VolumeServerStatusRequest
 	76, // 47: volume_server_pb.VolumeServer.VolumeServerLeave:input_type -> volume_server_pb.VolumeServerLeaveRequest
-	78, // 48: volume_server_pb.VolumeServer.Query:input_type -> volume_server_pb.QueryRequest
-	80, // 49: volume_server_pb.VolumeServer.VolumeNeedleStatus:input_type -> volume_server_pb.VolumeNeedleStatusRequest
-	1,  // 50: volume_server_pb.VolumeServer.BatchDelete:output_type -> volume_server_pb.BatchDeleteResponse
-	5,  // 51: volume_server_pb.VolumeServer.VacuumVolumeCheck:output_type -> volume_server_pb.VacuumVolumeCheckResponse
-	7,  // 52: volume_server_pb.VolumeServer.VacuumVolumeCompact:output_type -> volume_server_pb.VacuumVolumeCompactResponse
-	9,  // 53: volume_server_pb.VolumeServer.VacuumVolumeCommit:output_type -> volume_server_pb.VacuumVolumeCommitResponse
-	11, // 54: volume_server_pb.VolumeServer.VacuumVolumeCleanup:output_type -> volume_server_pb.VacuumVolumeCleanupResponse
-	13, // 55: volume_server_pb.VolumeServer.DeleteCollection:output_type -> volume_server_pb.DeleteCollectionResponse
-	15, // 56: volume_server_pb.VolumeServer.AllocateVolume:output_type -> volume_server_pb.AllocateVolumeResponse
-	17, // 57: volume_server_pb.VolumeServer.VolumeSyncStatus:output_type -> volume_server_pb.VolumeSyncStatusResponse
-	19, // 58: volume_server_pb.VolumeServer.VolumeIncrementalCopy:output_type -> volume_server_pb.VolumeIncrementalCopyResponse
-	21, // 59: volume_server_pb.VolumeServer.VolumeMount:output_type -> volume_server_pb.VolumeMountResponse
-	23, // 60: volume_server_pb.VolumeServer.VolumeUnmount:output_type -> volume_server_pb.VolumeUnmountResponse
-	25, // 61: volume_server_pb.VolumeServer.VolumeDelete:output_type -> volume_server_pb.VolumeDeleteResponse
-	27, // 62: volume_server_pb.VolumeServer.VolumeMarkReadonly:output_type -> volume_server_pb.VolumeMarkReadonlyResponse
-	29, // 63: volume_server_pb.VolumeServer.VolumeMarkWritable:output_type -> volume_server_pb.VolumeMarkWritableResponse
-	31, // 64: volume_server_pb.VolumeServer.VolumeConfigure:output_type -> volume_server_pb.VolumeConfigureResponse
-	33, // 65: volume_server_pb.VolumeServer.VolumeStatus:output_type -> volume_server_pb.VolumeStatusResponse
-	35, // 66: volume_server_pb.VolumeServer.VolumeCopy:output_type -> volume_server_pb.VolumeCopyResponse
-	65, // 67: volume_server_pb.VolumeServer.ReadVolumeFileStatus:output_type -> volume_server_pb.ReadVolumeFileStatusResponse
-	37, // 68: volume_server_pb.VolumeServer.CopyFile:output_type -> volume_server_pb.CopyFileResponse
-	39, // 69: volume_server_pb.VolumeServer.ReadNeedleBlob:output_type -> volume_server_pb.ReadNeedleBlobResponse
-	41, // 70: volume_server_pb.VolumeServer.WriteNeedleBlob:output_type -> volume_server_pb.WriteNeedleBlobResponse
-	43, // 71: volume_server_pb.VolumeServer.VolumeTailSender:output_type -> volume_server_pb.VolumeTailSenderResponse
-	45, // 72: volume_server_pb.VolumeServer.VolumeTailReceiver:output_type -> volume_server_pb.VolumeTailReceiverResponse
-	47, // 73: volume_server_pb.VolumeServer.VolumeEcShardsGenerate:output_type -> volume_server_pb.VolumeEcShardsGenerateResponse
-	49, // 74: volume_server_pb.VolumeServer.VolumeEcShardsRebuild:output_type -> volume_server_pb.VolumeEcShardsRebuildResponse
-	51, // 75: volume_server_pb.VolumeServer.VolumeEcShardsCopy:output_type -> volume_server_pb.VolumeEcShardsCopyResponse
-	53, // 76: volume_server_pb.VolumeServer.VolumeEcShardsDelete:output_type -> volume_server_pb.VolumeEcShardsDeleteResponse
-	55, // 77: volume_server_pb.VolumeServer.VolumeEcShardsMount:output_type -> volume_server_pb.VolumeEcShardsMountResponse
-	57, // 78: volume_server_pb.VolumeServer.VolumeEcShardsUnmount:output_type -> volume_server_pb.VolumeEcShardsUnmountResponse
-	59, // 79: volume_server_pb.VolumeServer.VolumeEcShardRead:output_type -> volume_server_pb.VolumeEcShardReadResponse
-	61, // 80: volume_server_pb.VolumeServer.VolumeEcBlobDelete:output_type -> volume_server_pb.VolumeEcBlobDeleteResponse
-	63, // 81: volume_server_pb.VolumeServer.VolumeEcShardsToVolume:output_type -> volume_server_pb.VolumeEcShardsToVolumeResponse
-	71, // 82: volume_server_pb.VolumeServer.VolumeTierMoveDatToRemote:output_type -> volume_server_pb.VolumeTierMoveDatToRemoteResponse
-	73, // 83: volume_server_pb.VolumeServer.VolumeTierMoveDatFromRemote:output_type -> volume_server_pb.VolumeTierMoveDatFromRemoteResponse
-	75, // 84: volume_server_pb.VolumeServer.VolumeServerStatus:output_type -> volume_server_pb.VolumeServerStatusResponse
-	77, // 85: volume_server_pb.VolumeServer.VolumeServerLeave:output_type -> volume_server_pb.VolumeServerLeaveResponse
-	79, // 86: volume_server_pb.VolumeServer.Query:output_type -> volume_server_pb.QueriedStripe
-	81, // 87: volume_server_pb.VolumeServer.VolumeNeedleStatus:output_type -> volume_server_pb.VolumeNeedleStatusResponse
-	50, // [50:88] is the sub-list for method output_type
-	12, // [12:50] is the sub-list for method input_type
+	78, // 48: volume_server_pb.VolumeServer.FetchAndWriteNeedle:input_type -> volume_server_pb.FetchAndWriteNeedleRequest
+	80, // 49: volume_server_pb.VolumeServer.Query:input_type -> volume_server_pb.QueryRequest
+	82, // 50: volume_server_pb.VolumeServer.VolumeNeedleStatus:input_type -> volume_server_pb.VolumeNeedleStatusRequest
+	1,  // 51: volume_server_pb.VolumeServer.BatchDelete:output_type -> volume_server_pb.BatchDeleteResponse
+	5,  // 52: volume_server_pb.VolumeServer.VacuumVolumeCheck:output_type -> volume_server_pb.VacuumVolumeCheckResponse
+	7,  // 53: volume_server_pb.VolumeServer.VacuumVolumeCompact:output_type -> volume_server_pb.VacuumVolumeCompactResponse
+	9,  // 54: volume_server_pb.VolumeServer.VacuumVolumeCommit:output_type -> volume_server_pb.VacuumVolumeCommitResponse
+	11, // 55: volume_server_pb.VolumeServer.VacuumVolumeCleanup:output_type -> volume_server_pb.VacuumVolumeCleanupResponse
+	13, // 56: volume_server_pb.VolumeServer.DeleteCollection:output_type -> volume_server_pb.DeleteCollectionResponse
+	15, // 57: volume_server_pb.VolumeServer.AllocateVolume:output_type -> volume_server_pb.AllocateVolumeResponse
+	17, // 58: volume_server_pb.VolumeServer.VolumeSyncStatus:output_type -> volume_server_pb.VolumeSyncStatusResponse
+	19, // 59: volume_server_pb.VolumeServer.VolumeIncrementalCopy:output_type -> volume_server_pb.VolumeIncrementalCopyResponse
+	21, // 60: volume_server_pb.VolumeServer.VolumeMount:output_type -> volume_server_pb.VolumeMountResponse
+	23, // 61: volume_server_pb.VolumeServer.VolumeUnmount:output_type -> volume_server_pb.VolumeUnmountResponse
+	25, // 62: volume_server_pb.VolumeServer.VolumeDelete:output_type -> volume_server_pb.VolumeDeleteResponse
+	27, // 63: volume_server_pb.VolumeServer.VolumeMarkReadonly:output_type -> volume_server_pb.VolumeMarkReadonlyResponse
+	29, // 64: volume_server_pb.VolumeServer.VolumeMarkWritable:output_type -> volume_server_pb.VolumeMarkWritableResponse
+	31, // 65: volume_server_pb.VolumeServer.VolumeConfigure:output_type -> volume_server_pb.VolumeConfigureResponse
+	33, // 66: volume_server_pb.VolumeServer.VolumeStatus:output_type -> volume_server_pb.VolumeStatusResponse
+	35, // 67: volume_server_pb.VolumeServer.VolumeCopy:output_type -> volume_server_pb.VolumeCopyResponse
+	65, // 68: volume_server_pb.VolumeServer.ReadVolumeFileStatus:output_type -> volume_server_pb.ReadVolumeFileStatusResponse
+	37, // 69: volume_server_pb.VolumeServer.CopyFile:output_type -> volume_server_pb.CopyFileResponse
+	39, // 70: volume_server_pb.VolumeServer.ReadNeedleBlob:output_type -> volume_server_pb.ReadNeedleBlobResponse
+	41, // 71: volume_server_pb.VolumeServer.WriteNeedleBlob:output_type -> volume_server_pb.WriteNeedleBlobResponse
+	43, // 72: volume_server_pb.VolumeServer.VolumeTailSender:output_type -> volume_server_pb.VolumeTailSenderResponse
+	45, // 73: volume_server_pb.VolumeServer.VolumeTailReceiver:output_type -> volume_server_pb.VolumeTailReceiverResponse
+	47, // 74: volume_server_pb.VolumeServer.VolumeEcShardsGenerate:output_type -> volume_server_pb.VolumeEcShardsGenerateResponse
+	49, // 75: volume_server_pb.VolumeServer.VolumeEcShardsRebuild:output_type -> volume_server_pb.VolumeEcShardsRebuildResponse
+	51, // 76: volume_server_pb.VolumeServer.VolumeEcShardsCopy:output_type -> volume_server_pb.VolumeEcShardsCopyResponse
+	53, // 77: volume_server_pb.VolumeServer.VolumeEcShardsDelete:output_type -> volume_server_pb.VolumeEcShardsDeleteResponse
+	55, // 78: volume_server_pb.VolumeServer.VolumeEcShardsMount:output_type -> volume_server_pb.VolumeEcShardsMountResponse
+	57, // 79: volume_server_pb.VolumeServer.VolumeEcShardsUnmount:output_type -> volume_server_pb.VolumeEcShardsUnmountResponse
+	59, // 80: volume_server_pb.VolumeServer.VolumeEcShardRead:output_type -> volume_server_pb.VolumeEcShardReadResponse
+	61, // 81: volume_server_pb.VolumeServer.VolumeEcBlobDelete:output_type -> volume_server_pb.VolumeEcBlobDeleteResponse
+	63, // 82: volume_server_pb.VolumeServer.VolumeEcShardsToVolume:output_type -> volume_server_pb.VolumeEcShardsToVolumeResponse
+	71, // 83: volume_server_pb.VolumeServer.VolumeTierMoveDatToRemote:output_type -> volume_server_pb.VolumeTierMoveDatToRemoteResponse
+	73, // 84: volume_server_pb.VolumeServer.VolumeTierMoveDatFromRemote:output_type -> volume_server_pb.VolumeTierMoveDatFromRemoteResponse
+	75, // 85: volume_server_pb.VolumeServer.VolumeServerStatus:output_type -> volume_server_pb.VolumeServerStatusResponse
+	77, // 86: volume_server_pb.VolumeServer.VolumeServerLeave:output_type -> volume_server_pb.VolumeServerLeaveResponse
+	79, // 87: volume_server_pb.VolumeServer.FetchAndWriteNeedle:output_type -> volume_server_pb.FetchAndWriteNeedleResponse
+	81, // 88: volume_server_pb.VolumeServer.Query:output_type -> volume_server_pb.QueriedStripe
+	83, // 89: volume_server_pb.VolumeServer.VolumeNeedleStatus:output_type -> volume_server_pb.VolumeNeedleStatusResponse
+	51, // [51:90] is the sub-list for method output_type
+	12, // [12:51] is the sub-list for method input_type
 	12, // [12:12] is the sub-list for extension type_name
 	12, // [12:12] is the sub-list for extension extendee
 	0,  // [0:12] is the sub-list for field type_name
@@ -7080,7 +7294,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[78].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest); i {
+			switch v := v.(*FetchAndWriteNeedleRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -7092,7 +7306,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[79].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueriedStripe); i {
+			switch v := v.(*FetchAndWriteNeedleResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -7104,7 +7318,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[80].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeNeedleStatusRequest); i {
+			switch v := v.(*QueryRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -7116,7 +7330,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[81].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeNeedleStatusResponse); i {
+			switch v := v.(*QueriedStripe); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -7128,7 +7342,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[82].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest_Filter); i {
+			switch v := v.(*VolumeNeedleStatusRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -7140,7 +7354,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[83].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest_InputSerialization); i {
+			switch v := v.(*VolumeNeedleStatusResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -7152,7 +7366,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[84].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest_OutputSerialization); i {
+			switch v := v.(*QueryRequest_Filter); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -7164,7 +7378,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[85].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest_InputSerialization_CSVInput); i {
+			switch v := v.(*QueryRequest_InputSerialization); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -7176,7 +7390,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[86].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest_InputSerialization_JSONInput); i {
+			switch v := v.(*QueryRequest_OutputSerialization); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -7188,7 +7402,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[87].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest_InputSerialization_ParquetInput); i {
+			switch v := v.(*QueryRequest_InputSerialization_CSVInput); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -7200,7 +7414,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[88].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest_OutputSerialization_CSVOutput); i {
+			switch v := v.(*QueryRequest_InputSerialization_JSONInput); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -7212,6 +7426,30 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[89].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*QueryRequest_InputSerialization_ParquetInput); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_volume_server_proto_msgTypes[90].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*QueryRequest_OutputSerialization_CSVOutput); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_volume_server_proto_msgTypes[91].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*QueryRequest_OutputSerialization_JSONOutput); i {
 			case 0:
 				return &v.state
@@ -7230,7 +7468,7 @@ func file_volume_server_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_volume_server_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   90,
+			NumMessages:   92,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
@@ -7296,6 +7534,8 @@ type VolumeServerClient interface {
 	VolumeTierMoveDatFromRemote(ctx context.Context, in *VolumeTierMoveDatFromRemoteRequest, opts ...grpc.CallOption) (VolumeServer_VolumeTierMoveDatFromRemoteClient, error)
 	VolumeServerStatus(ctx context.Context, in *VolumeServerStatusRequest, opts ...grpc.CallOption) (*VolumeServerStatusResponse, error)
 	VolumeServerLeave(ctx context.Context, in *VolumeServerLeaveRequest, opts ...grpc.CallOption) (*VolumeServerLeaveResponse, error)
+	// remote storage
+	FetchAndWriteNeedle(ctx context.Context, in *FetchAndWriteNeedleRequest, opts ...grpc.CallOption) (*FetchAndWriteNeedleResponse, error)
 	// <experimental> query
 	Query(ctx context.Context, in *QueryRequest, opts ...grpc.CallOption) (VolumeServer_QueryClient, error)
 	VolumeNeedleStatus(ctx context.Context, in *VolumeNeedleStatusRequest, opts ...grpc.CallOption) (*VolumeNeedleStatusResponse, error)
@@ -7771,6 +8011,15 @@ func (c *volumeServerClient) VolumeServerLeave(ctx context.Context, in *VolumeSe
 	return out, nil
 }
 
+func (c *volumeServerClient) FetchAndWriteNeedle(ctx context.Context, in *FetchAndWriteNeedleRequest, opts ...grpc.CallOption) (*FetchAndWriteNeedleResponse, error) {
+	out := new(FetchAndWriteNeedleResponse)
+	err := c.cc.Invoke(ctx, "/volume_server_pb.VolumeServer/FetchAndWriteNeedle", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 func (c *volumeServerClient) Query(ctx context.Context, in *QueryRequest, opts ...grpc.CallOption) (VolumeServer_QueryClient, error) {
 	stream, err := c.cc.NewStream(ctx, &_VolumeServer_serviceDesc.Streams[6], "/volume_server_pb.VolumeServer/Query", opts...)
 	if err != nil {
@@ -7854,6 +8103,8 @@ type VolumeServerServer interface {
 	VolumeTierMoveDatFromRemote(*VolumeTierMoveDatFromRemoteRequest, VolumeServer_VolumeTierMoveDatFromRemoteServer) error
 	VolumeServerStatus(context.Context, *VolumeServerStatusRequest) (*VolumeServerStatusResponse, error)
 	VolumeServerLeave(context.Context, *VolumeServerLeaveRequest) (*VolumeServerLeaveResponse, error)
+	// remote storage
+	FetchAndWriteNeedle(context.Context, *FetchAndWriteNeedleRequest) (*FetchAndWriteNeedleResponse, error)
 	// <experimental> query
 	Query(*QueryRequest, VolumeServer_QueryServer) error
 	VolumeNeedleStatus(context.Context, *VolumeNeedleStatusRequest) (*VolumeNeedleStatusResponse, error)
@@ -7971,6 +8222,9 @@ func (*UnimplementedVolumeServerServer) VolumeServerStatus(context.Context, *Vol
 func (*UnimplementedVolumeServerServer) VolumeServerLeave(context.Context, *VolumeServerLeaveRequest) (*VolumeServerLeaveResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method VolumeServerLeave not implemented")
 }
+func (*UnimplementedVolumeServerServer) FetchAndWriteNeedle(context.Context, *FetchAndWriteNeedleRequest) (*FetchAndWriteNeedleResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method FetchAndWriteNeedle not implemented")
+}
 func (*UnimplementedVolumeServerServer) Query(*QueryRequest, VolumeServer_QueryServer) error {
 	return status.Errorf(codes.Unimplemented, "method Query not implemented")
 }
@@ -8648,6 +8902,24 @@ func _VolumeServer_VolumeServerLeave_Handler(srv interface{}, ctx context.Contex
 	return interceptor(ctx, in, info, handler)
 }
 
+func _VolumeServer_FetchAndWriteNeedle_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(FetchAndWriteNeedleRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(VolumeServerServer).FetchAndWriteNeedle(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/volume_server_pb.VolumeServer/FetchAndWriteNeedle",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(VolumeServerServer).FetchAndWriteNeedle(ctx, req.(*FetchAndWriteNeedleRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 func _VolumeServer_Query_Handler(srv interface{}, stream grpc.ServerStream) error {
 	m := new(QueryRequest)
 	if err := stream.RecvMsg(m); err != nil {
@@ -8811,6 +9083,10 @@ var _VolumeServer_serviceDesc = grpc.ServiceDesc{
 			MethodName: "VolumeServerLeave",
 			Handler:    _VolumeServer_VolumeServerLeave_Handler,
 		},
+		{
+			MethodName: "FetchAndWriteNeedle",
+			Handler:    _VolumeServer_FetchAndWriteNeedle_Handler,
+		},
 		{
 			MethodName: "VolumeNeedleStatus",
 			Handler:    _VolumeServer_VolumeNeedleStatus_Handler,
diff --git a/weed/remote_storage/remote_storage.go b/weed/remote_storage/remote_storage.go
new file mode 100644
index 000000000..c94260ac0
--- /dev/null
+++ b/weed/remote_storage/remote_storage.go
@@ -0,0 +1,75 @@
+package remote_storage
+
+import (
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"io"
+	"strings"
+	"sync"
+)
+
+func ParseLocation(remote string) (loc *filer_pb.RemoteStorageLocation) {
+	loc = &filer_pb.RemoteStorageLocation{}
+	if strings.HasSuffix(string(remote), "/") {
+		remote = remote[:len(remote)-1]
+	}
+	parts := strings.SplitN(string(remote), "/", 3)
+	if len(parts) >= 1 {
+		loc.Name = parts[0]
+	}
+	if len(parts) >= 2 {
+		loc.Bucket = parts[1]
+	}
+	loc.Path = string(remote[len(loc.Name)+1+len(loc.Bucket):])
+	if loc.Path == "" {
+		loc.Path = "/"
+	}
+	return
+}
+
+type VisitFunc func(dir string, name string, isDirectory bool, remoteEntry *filer_pb.RemoteEntry) error
+
+type RemoteStorageClient interface {
+	Traverse(loc *filer_pb.RemoteStorageLocation, visitFn VisitFunc) error
+	ReadFile(loc *filer_pb.RemoteStorageLocation, offset int64, size int64) (data []byte, err error)
+	WriteFile(loc *filer_pb.RemoteStorageLocation, entry *filer_pb.Entry, reader io.Reader) (remoteEntry *filer_pb.RemoteEntry, err error)
+	UpdateFileMetadata(loc *filer_pb.RemoteStorageLocation, entry *filer_pb.Entry) (err error)
+	DeleteFile(loc *filer_pb.RemoteStorageLocation) (err error)
+}
+
+type RemoteStorageClientMaker interface {
+	Make(remoteConf *filer_pb.RemoteConf) (RemoteStorageClient, error)
+}
+
+var (
+	RemoteStorageClientMakers = make(map[string]RemoteStorageClientMaker)
+	remoteStorageClients      = make(map[string]RemoteStorageClient)
+	remoteStorageClientsLock  sync.Mutex
+)
+
+func makeRemoteStorageClient(remoteConf *filer_pb.RemoteConf) (RemoteStorageClient, error) {
+	maker, found := RemoteStorageClientMakers[remoteConf.Type]
+	if !found {
+		return nil, fmt.Errorf("remote storage type %s not found", remoteConf.Type)
+	}
+	return maker.Make(remoteConf)
+}
+
+func GetRemoteStorage(remoteConf *filer_pb.RemoteConf) (RemoteStorageClient, error) {
+	remoteStorageClientsLock.Lock()
+	defer remoteStorageClientsLock.Unlock()
+
+	existingRemoteStorageClient, found := remoteStorageClients[remoteConf.Name]
+	if found {
+		return existingRemoteStorageClient, nil
+	}
+
+	newRemoteStorageClient, err := makeRemoteStorageClient(remoteConf)
+	if err != nil {
+		return nil, fmt.Errorf("make remote storage client %s: %v", remoteConf.Name, err)
+	}
+
+	remoteStorageClients[remoteConf.Name] = newRemoteStorageClient
+
+	return newRemoteStorageClient, nil
+}
diff --git a/weed/remote_storage/s3/s3_storage_client.go b/weed/remote_storage/s3/s3_storage_client.go
new file mode 100644
index 000000000..5be64406e
--- /dev/null
+++ b/weed/remote_storage/s3/s3_storage_client.go
@@ -0,0 +1,215 @@
+package s3
+
+import (
+	"fmt"
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/aws/session"
+	"github.com/aws/aws-sdk-go/service/s3"
+	"github.com/aws/aws-sdk-go/service/s3/s3iface"
+	"github.com/aws/aws-sdk-go/service/s3/s3manager"
+	"github.com/chrislusf/seaweedfs/weed/filer"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/chrislusf/seaweedfs/weed/remote_storage"
+	"github.com/chrislusf/seaweedfs/weed/util"
+	"io"
+)
+
+func init() {
+	remote_storage.RemoteStorageClientMakers["s3"] = new(s3RemoteStorageMaker)
+}
+
+type s3RemoteStorageMaker struct{}
+
+func (s s3RemoteStorageMaker) Make(conf *filer_pb.RemoteConf) (remote_storage.RemoteStorageClient, error) {
+	client := &s3RemoteStorageClient{
+		conf: conf,
+	}
+	config := &aws.Config{
+		Region:           aws.String(conf.S3Region),
+		Endpoint:         aws.String(conf.S3Endpoint),
+		S3ForcePathStyle: aws.Bool(true),
+	}
+	if conf.S3AccessKey != "" && conf.S3SecretKey != "" {
+		config.Credentials = credentials.NewStaticCredentials(conf.S3AccessKey, conf.S3SecretKey, "")
+	}
+
+	sess, err := session.NewSession(config)
+	if err != nil {
+		return nil, fmt.Errorf("create aws session: %v", err)
+	}
+	client.conn = s3.New(sess)
+	return client, nil
+}
+
+type s3RemoteStorageClient struct {
+	conf *filer_pb.RemoteConf
+	conn s3iface.S3API
+}
+
+var _ = remote_storage.RemoteStorageClient(&s3RemoteStorageClient{})
+
+func (s *s3RemoteStorageClient) Traverse(remote *filer_pb.RemoteStorageLocation, visitFn remote_storage.VisitFunc) (err error) {
+
+	pathKey := remote.Path[1:]
+
+	listInput := &s3.ListObjectsV2Input{
+		Bucket:              aws.String(remote.Bucket),
+		ContinuationToken:   nil,
+		Delimiter:           nil, // not aws.String("/"), iterate through all entries
+		EncodingType:        nil,
+		ExpectedBucketOwner: nil,
+		FetchOwner:          nil,
+		MaxKeys:             nil, // aws.Int64(1000),
+		Prefix:              aws.String(pathKey),
+		RequestPayer:        nil,
+		StartAfter:          nil,
+	}
+	isLastPage := false
+	for !isLastPage && err == nil {
+		listErr := s.conn.ListObjectsV2Pages(listInput, func(page *s3.ListObjectsV2Output, lastPage bool) bool {
+			for _, content := range page.Contents {
+				key := *content.Key
+				if len(pathKey) == 0 {
+					key = "/" + key
+				} else {
+					key = key[len(pathKey):]
+				}
+				dir, name := util.FullPath(key).DirAndName()
+				if err := visitFn(dir, name, false, &filer_pb.RemoteEntry{
+					LastModifiedAt: (*content.LastModified).Unix(),
+					Size:           *content.Size,
+					ETag:           *content.ETag,
+					StorageName:    s.conf.Name,
+				}); err != nil {
+					return false
+				}
+			}
+			listInput.ContinuationToken = page.NextContinuationToken
+			isLastPage = lastPage
+			return true
+		})
+		if listErr != nil {
+			err = fmt.Errorf("list %v: %v", remote, listErr)
+		}
+	}
+	return
+}
+func (s *s3RemoteStorageClient) ReadFile(loc *filer_pb.RemoteStorageLocation, offset int64, size int64) (data []byte, err error) {
+	downloader := s3manager.NewDownloaderWithClient(s.conn, func(u *s3manager.Downloader) {
+		u.PartSize = int64(4 * 1024 * 1024)
+		u.Concurrency = 1
+	})
+
+	dataSlice := make([]byte, int(size))
+	writerAt := aws.NewWriteAtBuffer(dataSlice)
+
+	_, err = downloader.Download(writerAt, &s3.GetObjectInput{
+		Bucket: aws.String(loc.Bucket),
+		Key:    aws.String(loc.Path[1:]),
+		Range:  aws.String(fmt.Sprintf("bytes=%d-%d", offset, offset+size-1)),
+	})
+	if err != nil {
+		return nil, fmt.Errorf("failed to download file %s%s: %v", loc.Bucket, loc.Path, err)
+	}
+
+	return writerAt.Bytes(), nil
+}
+
+func (s *s3RemoteStorageClient) WriteFile(loc *filer_pb.RemoteStorageLocation, entry *filer_pb.Entry, reader io.Reader) (remoteEntry *filer_pb.RemoteEntry, err error) {
+
+	fileSize := int64(filer.FileSize(entry))
+
+	partSize := int64(8 * 1024 * 1024) // The minimum/default allowed part size is 5MB
+	for partSize*1000 < fileSize {
+		partSize *= 4
+	}
+
+	// Create an uploader with the session and custom options
+	uploader := s3manager.NewUploaderWithClient(s.conn, func(u *s3manager.Uploader) {
+		u.PartSize = partSize
+		u.Concurrency = 5
+	})
+
+	// process tagging
+	tags := ""
+	for k, v := range entry.Extended {
+		if len(tags) > 0 {
+			tags = tags + "&"
+		}
+		tags = tags + k + "=" + string(v)
+	}
+
+	// Upload the file to S3.
+	_, err = uploader.Upload(&s3manager.UploadInput{
+		Bucket:               aws.String(loc.Bucket),
+		Key:                  aws.String(loc.Path[1:]),
+		Body:                 reader,
+		ACL:                  aws.String("private"),
+		ServerSideEncryption: aws.String("AES256"),
+		StorageClass:         aws.String("STANDARD_IA"),
+		Tagging:              aws.String(tags),
+	})
+
+	//in case it fails to upload
+	if err != nil {
+		return nil, fmt.Errorf("upload to s3 %s/%s%s: %v", loc.Name, loc.Bucket, loc.Path, err)
+	}
+
+	// read back the remote entry
+	return s.readFileRemoteEntry(loc)
+
+}
+
+func toTagging(attributes map[string][]byte) *s3.Tagging {
+	tagging := &s3.Tagging{}
+	for k, v := range attributes {
+		tagging.TagSet = append(tagging.TagSet, &s3.Tag{
+			Key:   aws.String(k),
+			Value: aws.String(string(v)),
+		})
+	}
+	return tagging
+}
+
+func (s *s3RemoteStorageClient) readFileRemoteEntry(loc *filer_pb.RemoteStorageLocation) (*filer_pb.RemoteEntry, error) {
+	resp, err := s.conn.HeadObject(&s3.HeadObjectInput{
+		Bucket:  aws.String(loc.Bucket),
+		Key:     aws.String(loc.Path[1:]),
+	})
+	if err != nil {
+		return nil, err
+	}
+	
+	return &filer_pb.RemoteEntry{
+		LastModifiedAt: resp.LastModified.Unix(),
+		Size:           *resp.ContentLength,
+		ETag:           *resp.ETag,
+		StorageName:    s.conf.Name,
+	}, nil
+
+}
+
+func (s *s3RemoteStorageClient) UpdateFileMetadata(loc *filer_pb.RemoteStorageLocation, entry *filer_pb.Entry) (err error) {
+	tagging := toTagging(entry.Extended)
+	if len(tagging.TagSet) > 0 {
+		_, err = s.conn.PutObjectTagging(&s3.PutObjectTaggingInput{
+			Bucket:  aws.String(loc.Bucket),
+			Key:     aws.String(loc.Path[1:]),
+			Tagging: toTagging(entry.Extended),
+		})
+	} else {
+		_, err = s.conn.DeleteObjectTagging(&s3.DeleteObjectTaggingInput{
+			Bucket:  aws.String(loc.Bucket),
+			Key:     aws.String(loc.Path[1:]),
+		})
+	}
+	return
+}
+func (s *s3RemoteStorageClient) DeleteFile(loc *filer_pb.RemoteStorageLocation) (err error) {
+	_, err = s.conn.DeleteObject(&s3.DeleteObjectInput{
+		Bucket: aws.String(loc.Bucket),
+		Key:    aws.String(loc.Path[1:]),
+	})
+	return
+}
diff --git a/weed/replication/sink/filersink/filer_sink.go b/weed/replication/sink/filersink/filer_sink.go
index 2b526cc52..d42ca63a8 100644
--- a/weed/replication/sink/filersink/filer_sink.go
+++ b/weed/replication/sink/filersink/filer_sink.go
@@ -134,7 +134,7 @@ func (fs *FilerSink) CreateEntry(key string, entry *filer_pb.Entry, signatures [
 				Attributes:  entry.Attributes,
 				Chunks:      replicatedChunks,
 				Content:     entry.Content,
-				Remote:      entry.Remote,
+				RemoteEntry: entry.RemoteEntry,
 			},
 			IsFromOtherCluster: true,
 			Signatures:         signatures,
diff --git a/weed/s3api/auth_credentials_subscribe.go b/weed/s3api/auth_credentials_subscribe.go
index ea4b69550..05cce632a 100644
--- a/weed/s3api/auth_credentials_subscribe.go
+++ b/weed/s3api/auth_credentials_subscribe.go
@@ -1,13 +1,11 @@
 package s3api
 
 import (
-	"context"
-	"fmt"
 	"github.com/chrislusf/seaweedfs/weed/filer"
 	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
-	"io"
-	"time"
+	"github.com/chrislusf/seaweedfs/weed/util"
 )
 
 func (s3a *S3ApiServer) subscribeMetaEvents(clientName string, prefix string, lastTsNs int64) error {
@@ -34,37 +32,8 @@ func (s3a *S3ApiServer) subscribeMetaEvents(clientName string, prefix string, la
 		return nil
 	}
 
-	for {
-		err := s3a.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
-			ctx, cancel := context.WithCancel(context.Background())
-			defer cancel()
-			stream, err := client.SubscribeMetadata(ctx, &filer_pb.SubscribeMetadataRequest{
-				ClientName: clientName,
-				PathPrefix: prefix,
-				SinceNs:    lastTsNs,
-			})
-			if err != nil {
-				return fmt.Errorf("subscribe: %v", err)
-			}
+	return util.Retry("followIamChanges", func() error {
+		return pb.WithFilerClientFollowMetadata(s3a, clientName, prefix, lastTsNs, 0, processEventFn, true)
+	})
 
-			for {
-				resp, listenErr := stream.Recv()
-				if listenErr == io.EOF {
-					return nil
-				}
-				if listenErr != nil {
-					return listenErr
-				}
-
-				if err := processEventFn(resp); err != nil {
-					glog.Fatalf("process %v: %v", resp, err)
-				}
-				lastTsNs = resp.TsNs
-			}
-		})
-		if err != nil {
-			glog.Errorf("subscribing filer meta change: %v", err)
-		}
-		time.Sleep(time.Second)
-	}
 }
diff --git a/weed/server/filer_server.go b/weed/server/filer_server.go
index d7afaa65a..534bc4840 100644
--- a/weed/server/filer_server.go
+++ b/weed/server/filer_server.go
@@ -149,6 +149,8 @@ func NewFilerServer(defaultMux, readonlyMux *http.ServeMux, option *FilerOption)
 
 	fs.filer.LoadFilerConf()
 
+	fs.filer.LoadRemoteStorageConfAndMapping()
+
 	grace.OnInterrupt(func() {
 		fs.filer.Shutdown()
 	})
diff --git a/weed/server/filer_server_handlers_read.go b/weed/server/filer_server_handlers_read.go
index 957e08855..86454f8c5 100644
--- a/weed/server/filer_server_handlers_read.go
+++ b/weed/server/filer_server_handlers_read.go
@@ -101,7 +101,7 @@ func (fs *FilerServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request)
 
 	//Seaweed custom header are not visible to Vue or javascript
 	seaweedHeaders := []string{}
-	for header, _ := range w.Header() {
+	for header := range w.Header() {
 		if strings.HasPrefix(header, "Seaweed-") {
 			seaweedHeaders = append(seaweedHeaders, header)
 		}
@@ -163,9 +163,18 @@ func (fs *FilerServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request)
 			}
 			return err
 		}
-		err = filer.StreamContent(fs.filer.MasterClient, writer, entry.Chunks, offset, size)
-		if err != nil {
-			glog.Errorf("failed to stream content %s: %v", r.URL, err)
+		if entry.IsInRemoteOnly() {
+			var data []byte
+			data, err = fs.filer.ReadRemote(entry, offset, size)
+			if err != nil {
+				glog.Errorf("failed to read remote %s: %v", r.URL, err)
+			}
+			_, err = w.Write(data)
+		} else {
+			err = filer.StreamContent(fs.filer.MasterClient, writer, entry.Chunks, offset, size)
+			if err != nil {
+				glog.Errorf("failed to stream content %s: %v", r.URL, err)
+			}
 		}
 		return err
 	})
diff --git a/weed/server/master_server.go b/weed/server/master_server.go
index 9d222a342..a23ad0698 100644
--- a/weed/server/master_server.go
+++ b/weed/server/master_server.go
@@ -228,6 +228,7 @@ func (ms *MasterServer) startAdminScripts() {
 	shellOptions.Masters = &masterAddress
 
 	shellOptions.FilerHost, shellOptions.FilerPort, err = util.ParseHostPort(filerHostPort)
+	shellOptions.FilerAddress = filerHostPort
 	shellOptions.Directory = "/"
 	if err != nil {
 		glog.V(0).Infof("failed to parse master.filer.default = %s : %v\n", filerHostPort, err)
diff --git a/weed/server/volume_grpc_remote.go b/weed/server/volume_grpc_remote.go
new file mode 100644
index 000000000..0b6cd465b
--- /dev/null
+++ b/weed/server/volume_grpc_remote.go
@@ -0,0 +1,49 @@
+package weed_server
+
+import (
+	"context"
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
+	"github.com/chrislusf/seaweedfs/weed/remote_storage"
+	"github.com/chrislusf/seaweedfs/weed/storage/needle"
+	"github.com/chrislusf/seaweedfs/weed/storage/types"
+)
+
+func (vs *VolumeServer) FetchAndWriteNeedle(ctx context.Context, req *volume_server_pb.FetchAndWriteNeedleRequest) (resp *volume_server_pb.FetchAndWriteNeedleResponse, err error) {
+	resp = &volume_server_pb.FetchAndWriteNeedleResponse{}
+	v := vs.store.GetVolume(needle.VolumeId(req.VolumeId))
+	if v == nil {
+		return nil, fmt.Errorf("not found volume id %d", req.VolumeId)
+	}
+
+	remoteConf := &filer_pb.RemoteConf{
+		Type: req.RemoteType,
+		Name: req.RemoteName,
+		S3AccessKey: req.S3AccessKey,
+		S3SecretKey: req.S3SecretKey,
+		S3Region: req.S3Region,
+		S3Endpoint: req.S3Endpoint,
+	}
+
+	client, getClientErr := remote_storage.GetRemoteStorage(remoteConf)
+	if getClientErr != nil  {
+		return nil, fmt.Errorf("get remote client: %v", getClientErr)
+	}
+
+	remoteStorageLocation := &filer_pb.RemoteStorageLocation{
+		Name:   req.RemoteName,
+		Bucket: req.RemoteBucket,
+		Path:   req.RemoteKey,
+	}
+	data, ReadRemoteErr := client.ReadFile(remoteStorageLocation, req.Offset, req.Size)
+	if ReadRemoteErr != nil {
+		return nil, fmt.Errorf("read from remote %+v: %v", remoteStorageLocation, ReadRemoteErr)
+	}
+
+	if err = v.WriteNeedleBlob(types.NeedleId(req.NeedleId), data, types.Size(req.Size)); err != nil {
+		return nil, fmt.Errorf("write blob needle %d size %d: %v", req.NeedleId, req.Size, err)
+	}
+
+	return resp, nil
+}
diff --git a/weed/shell/command_remote_configure.go b/weed/shell/command_remote_configure.go
index 567143ce1..7a9ad1f65 100644
--- a/weed/shell/command_remote_configure.go
+++ b/weed/shell/command_remote_configure.go
@@ -7,9 +7,11 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/filer"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/util"
+	"github.com/golang/protobuf/jsonpb"
 	"github.com/golang/protobuf/proto"
 	"io"
 	"regexp"
+	"strings"
 )
 
 func init() {
@@ -84,6 +86,9 @@ func (c *commandRemoteConfigure) listExistingRemoteStorages(commandEnv *CommandE
 			fmt.Fprintf(writer, "skipping %s\n", entry.Name)
 			return nil
 		}
+		if !strings.HasSuffix(entry.Name, filer.REMOTE_STORAGE_CONF_SUFFIX) {
+			return nil
+		}
 		conf := &filer_pb.RemoteConf{}
 
 		if err := proto.Unmarshal(entry.Content, conf); err != nil {
@@ -92,9 +97,15 @@ func (c *commandRemoteConfigure) listExistingRemoteStorages(commandEnv *CommandE
 
 		conf.S3SecretKey = ""
 
-		fmt.Fprintf(writer, "%+v\n", conf)
+		m := jsonpb.Marshaler{
+			EmitDefaults: false,
+			Indent:       "  ",
+		}
 
-		return nil
+		err := m.Marshal(writer, conf)
+		fmt.Fprintln(writer)
+
+		return err
 	})
 
 }
@@ -105,7 +116,7 @@ func (c *commandRemoteConfigure) deleteRemoteStorage(commandEnv *CommandEnv, wri
 
 		request := &filer_pb.DeleteEntryRequest{
 			Directory:            filer.DirectoryEtcRemote,
-			Name:                 storageName,
+			Name:                 storageName + filer.REMOTE_STORAGE_CONF_SUFFIX,
 			IgnoreRecursiveError: false,
 			IsDeleteData:         true,
 			IsRecursive:          true,
@@ -132,7 +143,7 @@ func (c *commandRemoteConfigure) saveRemoteStorage(commandEnv *CommandEnv, write
 	}
 
 	if err = commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
-		return filer.SaveInsideFiler(client, filer.DirectoryEtcRemote, conf.Name, data)
+		return filer.SaveInsideFiler(client, filer.DirectoryEtcRemote, conf.Name+filer.REMOTE_STORAGE_CONF_SUFFIX, data)
 	}); err != nil && err != filer_pb.ErrNotFound {
 		return err
 	}
diff --git a/weed/shell/command_remote_mount.go b/weed/shell/command_remote_mount.go
new file mode 100644
index 000000000..37b235a55
--- /dev/null
+++ b/weed/shell/command_remote_mount.go
@@ -0,0 +1,232 @@
+package shell
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/filer"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/chrislusf/seaweedfs/weed/remote_storage"
+	"github.com/chrislusf/seaweedfs/weed/util"
+	"github.com/golang/protobuf/jsonpb"
+	"io"
+)
+
+func init() {
+	Commands = append(Commands, &commandRemoteMount{})
+}
+
+type commandRemoteMount struct {
+}
+
+func (c *commandRemoteMount) Name() string {
+	return "remote.mount"
+}
+
+func (c *commandRemoteMount) Help() string {
+	return `mount remote storage and pull its metadata
+
+	# assume a remote storage is configured to name "s3_1"
+	remote.configure -name=s3_1 -type=s3 -access_key=xxx -secret_key=yyy
+
+	# mount and pull one bucket
+	remote.mount -dir=xxx -remote=s3_1/bucket
+	# mount and pull one directory in the bucket
+	remote.mount -dir=xxx -remote=s3_1/bucket/dir1
+
+`
+}
+
+func (c *commandRemoteMount) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
+
+	remoteMountCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+
+	dir := remoteMountCommand.String("dir", "", "a directory in filer")
+	nonEmpty := remoteMountCommand.Bool("nonempty", false, "allows the mounting over a non-empty directory")
+	remote := remoteMountCommand.String("remote", "", "a directory in remote storage, ex. <storageName>/<bucket>/path/to/dir")
+
+	if err = remoteMountCommand.Parse(args); err != nil {
+		return nil
+	}
+
+	if *dir == "" {
+		return c.listExistingRemoteStorageMounts(commandEnv, writer)
+	}
+
+	remoteStorageLocation := remote_storage.ParseLocation(*remote)
+
+	// find configuration for remote storage
+	// remotePath is /<bucket>/path/to/dir
+	remoteConf, err := c.findRemoteStorageConfiguration(commandEnv, writer, remoteStorageLocation)
+	if err != nil {
+		return fmt.Errorf("find configuration for %s: %v", *remote, err)
+	}
+
+	// pull metadata from remote
+	if err = c.pullMetadata(commandEnv, writer, *dir, *nonEmpty, remoteConf, remoteStorageLocation); err != nil {
+		return fmt.Errorf("pull metadata: %v", err)
+	}
+
+	// store a mount configuration in filer
+	if err = c.saveMountMapping(commandEnv, writer, *dir, remoteStorageLocation); err != nil {
+		return fmt.Errorf("save mount mapping: %v", err)
+	}
+
+	return nil
+}
+
+func (c *commandRemoteMount) listExistingRemoteStorageMounts(commandEnv *CommandEnv, writer io.Writer) (err error) {
+
+	// read current mapping
+	mappings, readErr := filer.ReadMountMappings(commandEnv.option.GrpcDialOption, commandEnv.option.FilerAddress)
+	if readErr != nil {
+		return readErr
+	}
+
+	m := jsonpb.Marshaler{
+		EmitDefaults: false,
+		Indent:       "  ",
+	}
+
+	err = m.Marshal(writer, mappings)
+	fmt.Fprintln(writer)
+
+	return
+
+}
+
+func (c *commandRemoteMount) findRemoteStorageConfiguration(commandEnv *CommandEnv, writer io.Writer, remote *filer_pb.RemoteStorageLocation) (conf *filer_pb.RemoteConf, err error) {
+
+	return filer.ReadRemoteStorageConf(commandEnv.option.GrpcDialOption, commandEnv.option.FilerAddress, remote.Name)
+
+}
+
+func (c *commandRemoteMount) pullMetadata(commandEnv *CommandEnv, writer io.Writer, dir string, nonEmpty bool, remoteConf *filer_pb.RemoteConf, remote *filer_pb.RemoteStorageLocation) error {
+
+	// find existing directory, and ensure the directory is empty
+	err := commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+		parent, name := util.FullPath(dir).DirAndName()
+		_, lookupErr := client.LookupDirectoryEntry(context.Background(), &filer_pb.LookupDirectoryEntryRequest{
+			Directory: parent,
+			Name:      name,
+		})
+		if lookupErr != nil {
+			return fmt.Errorf("lookup %s: %v", dir, lookupErr)
+		}
+
+		mountToDirIsEmpty := true
+		listErr := filer_pb.SeaweedList(client, dir, "", func(entry *filer_pb.Entry, isLast bool) error {
+			mountToDirIsEmpty = false
+			return nil
+		}, "", false, 1)
+
+		if listErr != nil {
+			return fmt.Errorf("list %s: %v", dir, listErr)
+		}
+
+		if !mountToDirIsEmpty {
+			if !nonEmpty {
+				return fmt.Errorf("dir %s is not empty", dir)
+			}
+		}
+
+		return nil
+	})
+	if err != nil {
+		return err
+	}
+
+	// visit remote storage
+	remoteStorage, err := remote_storage.GetRemoteStorage(remoteConf)
+	if err != nil {
+		return err
+	}
+
+	err = commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+		ctx := context.Background()
+		err = remoteStorage.Traverse(remote, func(remoteDir, name string, isDirectory bool, remoteEntry *filer_pb.RemoteEntry) error {
+			localDir := dir + remoteDir
+			println(util.NewFullPath(localDir, name))
+
+			lookupResponse, lookupErr := filer_pb.LookupEntry(client, &filer_pb.LookupDirectoryEntryRequest{
+				Directory: localDir,
+				Name:      name,
+			})
+			var existingEntry *filer_pb.Entry
+			if lookupErr != nil {
+				if lookupErr != filer_pb.ErrNotFound {
+					return lookupErr
+				}
+			} else {
+				existingEntry = lookupResponse.Entry
+			}
+
+			if existingEntry == nil {
+				_, createErr := client.CreateEntry(ctx, &filer_pb.CreateEntryRequest{
+					Directory: localDir,
+					Entry: &filer_pb.Entry{
+						Name:        name,
+						IsDirectory: isDirectory,
+						Attributes: &filer_pb.FuseAttributes{
+							FileSize: uint64(remoteEntry.Size),
+							Mtime:    remoteEntry.LastModifiedAt,
+							FileMode: uint32(0644),
+						},
+						RemoteEntry: remoteEntry,
+					},
+				})
+				return createErr
+			} else {
+				if existingEntry.RemoteEntry == nil || existingEntry.RemoteEntry.ETag != remoteEntry.ETag {
+					existingEntry.RemoteEntry = remoteEntry
+					existingEntry.Attributes.FileSize = uint64(remoteEntry.Size)
+					existingEntry.Attributes.Mtime = remoteEntry.LastModifiedAt
+					_, updateErr := client.UpdateEntry(ctx, &filer_pb.UpdateEntryRequest{
+						Directory: localDir,
+						Entry:     existingEntry,
+					})
+					return updateErr
+				}
+			}
+			return nil
+		})
+		return err
+	})
+
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (c *commandRemoteMount) saveMountMapping(commandEnv *CommandEnv, writer io.Writer, dir string, remoteStorageLocation *filer_pb.RemoteStorageLocation) (err error) {
+
+	// read current mapping
+	var oldContent, newContent []byte
+	err = commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+		oldContent, err = filer.ReadInsideFiler(client, filer.DirectoryEtcRemote, filer.REMOTE_STORAGE_MOUNT_FILE)
+		return err
+	})
+	if err != nil {
+		if err != filer_pb.ErrNotFound {
+			return fmt.Errorf("read existing mapping: %v", err)
+		}
+	}
+
+	// add new mapping
+	newContent, err = filer.AddRemoteStorageMapping(oldContent, dir, remoteStorageLocation)
+	if err != nil {
+		return fmt.Errorf("add mapping %s~%s: %v", dir, remoteStorageLocation, err)
+	}
+
+	// save back
+	err = commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+		return filer.SaveInsideFiler(client, filer.DirectoryEtcRemote, filer.REMOTE_STORAGE_MOUNT_FILE, newContent)
+	})
+	if err != nil {
+		return fmt.Errorf("save mapping: %v", err)
+	}
+
+	return nil
+}
diff --git a/weed/shell/command_volume_balance_test.go b/weed/shell/command_volume_balance_test.go
index b77811f51..d6624bbcc 100644
--- a/weed/shell/command_volume_balance_test.go
+++ b/weed/shell/command_volume_balance_test.go
@@ -1,6 +1,8 @@
 package shell
 
 import (
+	"github.com/chrislusf/seaweedfs/weed/storage/types"
+	"github.com/stretchr/testify/assert"
 	"testing"
 
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
@@ -181,3 +183,14 @@ func TestBalance(t *testing.T) {
 	}
 
 }
+
+func TestVolumeSelection(t *testing.T) {
+	topologyInfo := parseOutput(topoData)
+
+	vids, err := collectVolumeIdsForTierChange(nil, topologyInfo, 1000, types.ToDiskType("hdd"), "", 20.0, 0);
+	if err != nil {
+		t.Errorf("collectVolumeIdsForTierChange: %v", err)
+	}
+	assert.Equal(t, 378, len(vids))
+
+}
diff --git a/weed/shell/command_volume_list_test.go b/weed/shell/command_volume_list_test.go
index 72c76f242..379cf4943 100644
--- a/weed/shell/command_volume_list_test.go
+++ b/weed/shell/command_volume_list_test.go
@@ -68,7 +68,7 @@ func parseOutput(output string) *master_pb.TopologyInfo {
 				maxVolumeCount, _ := strconv.Atoi(maxVolumeCountStr)
 				disk = &master_pb.DiskInfo{
 					Type:           diskType,
-					MaxVolumeCount: uint64(maxVolumeCount),
+					MaxVolumeCount: int64(maxVolumeCount),
 				}
 				dn.DiskInfos[types.ToDiskType(diskType).String()] = disk
 			} else {
diff --git a/weed/shell/commands.go b/weed/shell/commands.go
index 697c68ae3..5497e89cc 100644
--- a/weed/shell/commands.go
+++ b/weed/shell/commands.go
@@ -20,9 +20,10 @@ type ShellOptions struct {
 	Masters        *string
 	GrpcDialOption grpc.DialOption
 	// shell transient context
-	FilerHost string
-	FilerPort int64
-	Directory string
+	FilerHost    string
+	FilerPort    int64
+	FilerAddress string
+	Directory    string
 }
 
 type CommandEnv struct {
diff --git a/weed/topology/store_replicate.go b/weed/topology/store_replicate.go
index ea0a8c968..6d68bb26f 100644
--- a/weed/topology/store_replicate.go
+++ b/weed/topology/store_replicate.go
@@ -50,7 +50,7 @@ func ReplicatedWrite(masterFn operation.GetMasterFn, s *storage.Store, volumeId
 	}
 
 	if len(remoteLocations) > 0 { //send to other replica locations
-		if err = distributedOperation(remoteLocations, s, func(location operation.Location) error {
+		if err = DistributedOperation(remoteLocations, func(location operation.Location) error {
 			u := url.URL{
 				Scheme: "http",
 				Host:   location.Url,
@@ -115,7 +115,7 @@ func ReplicatedDelete(masterFn operation.GetMasterFn, store *storage.Store,
 	}
 
 	if len(remoteLocations) > 0 { //send to other replica locations
-		if err = distributedOperation(remoteLocations, store, func(location operation.Location) error {
+		if err = DistributedOperation(remoteLocations, func(location operation.Location) error {
 			return util.Delete("http://"+location.Url+r.URL.Path+"?type=replicate", string(jwt))
 		}); err != nil {
 			size = 0
@@ -144,7 +144,7 @@ type RemoteResult struct {
 	Error error
 }
 
-func distributedOperation(locations []operation.Location, store *storage.Store, op func(location operation.Location) error) error {
+func DistributedOperation(locations []operation.Location, op func(location operation.Location) error) error {
 	length := len(locations)
 	results := make(chan RemoteResult)
 	for _, location := range locations {