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This commit is contained in:
Chris Lu 2019-03-25 09:16:12 -07:00
parent eaa42c3865
commit 70815e9124
10 changed files with 568 additions and 120 deletions
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27
weed/command/backup.go
View file

@ -88,7 +88,32 @@ func runBackup(cmd *Command, args []string) bool {
return true
}
if err := v.Synchronize(volumeServer, grpcDialOption); err != nil {
if v.SuperBlock.CompactRevision < uint16(stats.CompactRevision) {
if err = v.Compact(0); err != nil {
fmt.Printf("Compact Volume before synchronizing %v\n", err)
return true
}
if err = v.CommitCompact(); err != nil {
fmt.Printf("Commit Compact before synchronizing %v\n", err)
return true
}
v.SuperBlock.CompactRevision = uint16(stats.CompactRevision)
v.DataFile().WriteAt(v.SuperBlock.Bytes(),0)
}
if uint64(v.Size()) > stats.TailOffset {
// remove the old data
v.Destroy()
// recreate an empty volume
v, err = storage.NewVolume(*s.dir, *s.collection, vid, storage.NeedleMapInMemory, replication, ttl, 0)
if err != nil {
fmt.Printf("Error creating or reading from volume %d: %v\n", vid, err)
return true
}
}
defer v.Close()
if err := v.Follow(volumeServer, grpcDialOption); err != nil {
fmt.Printf("Error synchronizing volume %d: %v\n", vid, err)
return true
}

10
weed/pb/volume_server.proto
View file

@ -24,6 +24,8 @@ service VolumeServer {
rpc VolumeSyncStatus (VolumeSyncStatusRequest) returns (VolumeSyncStatusResponse) {
}
rpc VolumeFollow (VolumeFollowRequest) returns (stream VolumeFollowResponse) {
}
rpc VolumeSyncIndex (VolumeSyncIndexRequest) returns (stream VolumeSyncIndexResponse) {
}
rpc VolumeSyncData (VolumeSyncDataRequest) returns (stream VolumeSyncDataResponse) {
@ -119,6 +121,14 @@ message VolumeSyncStatusResponse {
uint64 idx_file_size = 8;
}
message VolumeFollowRequest {
uint32 volume_id = 1;
uint64 since = 2;
}
message VolumeFollowResponse {
bytes file_content = 1;
}
message VolumeSyncIndexRequest {
uint32 volume_id = 1;
}

307
weed/pb/volume_server_pb/volume_server.pb.go
View file

@ -27,6 +27,8 @@ It has these top-level messages:
AssignVolumeResponse
VolumeSyncStatusRequest
VolumeSyncStatusResponse
VolumeFollowRequest
VolumeFollowResponse
VolumeSyncIndexRequest
VolumeSyncIndexResponse
VolumeSyncDataRequest
@ -420,6 +422,46 @@ func (m *VolumeSyncStatusResponse) GetIdxFileSize() uint64 {
return 0
}
type VolumeFollowRequest struct {
VolumeId uint32 `protobuf:"varint,1,opt,name=volume_id,json=volumeId" json:"volume_id,omitempty"`
Since uint64 `protobuf:"varint,2,opt,name=since" json:"since,omitempty"`
}
func (m *VolumeFollowRequest) Reset() { *m = VolumeFollowRequest{} }
func (m *VolumeFollowRequest) String() string { return proto.CompactTextString(m) }
func (*VolumeFollowRequest) ProtoMessage() {}
func (*VolumeFollowRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{18} }
func (m *VolumeFollowRequest) GetVolumeId() uint32 {
if m != nil {
return m.VolumeId
}
return 0
}
func (m *VolumeFollowRequest) GetSince() uint64 {
if m != nil {
return m.Since
}
return 0
}
type VolumeFollowResponse struct {
FileContent []byte `protobuf:"bytes,1,opt,name=file_content,json=fileContent,proto3" json:"file_content,omitempty"`
}
func (m *VolumeFollowResponse) Reset() { *m = VolumeFollowResponse{} }
func (m *VolumeFollowResponse) String() string { return proto.CompactTextString(m) }
func (*VolumeFollowResponse) ProtoMessage() {}
func (*VolumeFollowResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{19} }
func (m *VolumeFollowResponse) GetFileContent() []byte {
if m != nil {
return m.FileContent
}
return nil
}
type VolumeSyncIndexRequest struct {
VolumeId uint32 `protobuf:"varint,1,opt,name=volume_id,json=volumeId" json:"volume_id,omitempty"`
}
@ -427,7 +469,7 @@ type VolumeSyncIndexRequest struct {
func (m *VolumeSyncIndexRequest) Reset() { *m = VolumeSyncIndexRequest{} }
func (m *VolumeSyncIndexRequest) String() string { return proto.CompactTextString(m) }
func (*VolumeSyncIndexRequest) ProtoMessage() {}
func (*VolumeSyncIndexRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{18} }
func (*VolumeSyncIndexRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{20} }
func (m *VolumeSyncIndexRequest) GetVolumeId() uint32 {
if m != nil {
@ -443,7 +485,7 @@ type VolumeSyncIndexResponse struct {
func (m *VolumeSyncIndexResponse) Reset() { *m = VolumeSyncIndexResponse{} }
func (m *VolumeSyncIndexResponse) String() string { return proto.CompactTextString(m) }
func (*VolumeSyncIndexResponse) ProtoMessage() {}
func (*VolumeSyncIndexResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{19} }
func (*VolumeSyncIndexResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{21} }
func (m *VolumeSyncIndexResponse) GetIndexFileContent() []byte {
if m != nil {
@ -463,7 +505,7 @@ type VolumeSyncDataRequest struct {
func (m *VolumeSyncDataRequest) Reset() { *m = VolumeSyncDataRequest{} }
func (m *VolumeSyncDataRequest) String() string { return proto.CompactTextString(m) }
func (*VolumeSyncDataRequest) ProtoMessage() {}
func (*VolumeSyncDataRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{20} }
func (*VolumeSyncDataRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{22} }
func (m *VolumeSyncDataRequest) GetVolumeId() uint32 {
if m != nil {
@ -507,7 +549,7 @@ type VolumeSyncDataResponse struct {
func (m *VolumeSyncDataResponse) Reset() { *m = VolumeSyncDataResponse{} }
func (m *VolumeSyncDataResponse) String() string { return proto.CompactTextString(m) }
func (*VolumeSyncDataResponse) ProtoMessage() {}
func (*VolumeSyncDataResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{21} }
func (*VolumeSyncDataResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{23} }
func (m *VolumeSyncDataResponse) GetFileContent() []byte {
if m != nil {
@ -523,7 +565,7 @@ type VolumeMountRequest struct {
func (m *VolumeMountRequest) Reset() { *m = VolumeMountRequest{} }
func (m *VolumeMountRequest) String() string { return proto.CompactTextString(m) }
func (*VolumeMountRequest) ProtoMessage() {}
func (*VolumeMountRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{22} }
func (*VolumeMountRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{24} }
func (m *VolumeMountRequest) GetVolumeId() uint32 {
if m != nil {
@ -538,7 +580,7 @@ type VolumeMountResponse struct {
func (m *VolumeMountResponse) Reset() { *m = VolumeMountResponse{} }
func (m *VolumeMountResponse) String() string { return proto.CompactTextString(m) }
func (*VolumeMountResponse) ProtoMessage() {}
func (*VolumeMountResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{23} }
func (*VolumeMountResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{25} }
type VolumeUnmountRequest struct {
VolumeId uint32 `protobuf:"varint,1,opt,name=volume_id,json=volumeId" json:"volume_id,omitempty"`
@ -547,7 +589,7 @@ type VolumeUnmountRequest struct {
func (m *VolumeUnmountRequest) Reset() { *m = VolumeUnmountRequest{} }
func (m *VolumeUnmountRequest) String() string { return proto.CompactTextString(m) }
func (*VolumeUnmountRequest) ProtoMessage() {}
func (*VolumeUnmountRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{24} }
func (*VolumeUnmountRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{26} }
func (m *VolumeUnmountRequest) GetVolumeId() uint32 {
if m != nil {
@ -562,7 +604,7 @@ type VolumeUnmountResponse struct {
func (m *VolumeUnmountResponse) Reset() { *m = VolumeUnmountResponse{} }
func (m *VolumeUnmountResponse) String() string { return proto.CompactTextString(m) }
func (*VolumeUnmountResponse) ProtoMessage() {}
func (*VolumeUnmountResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{25} }
func (*VolumeUnmountResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{27} }
type VolumeDeleteRequest struct {
VolumeId uint32 `protobuf:"varint,1,opt,name=volume_id,json=volumeId" json:"volume_id,omitempty"`
@ -571,7 +613,7 @@ type VolumeDeleteRequest struct {
func (m *VolumeDeleteRequest) Reset() { *m = VolumeDeleteRequest{} }
func (m *VolumeDeleteRequest) String() string { return proto.CompactTextString(m) }
func (*VolumeDeleteRequest) ProtoMessage() {}
func (*VolumeDeleteRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{26} }
func (*VolumeDeleteRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{28} }
func (m *VolumeDeleteRequest) GetVolumeId() uint32 {
if m != nil {
@ -586,7 +628,7 @@ type VolumeDeleteResponse struct {
func (m *VolumeDeleteResponse) Reset() { *m = VolumeDeleteResponse{} }
func (m *VolumeDeleteResponse) String() string { return proto.CompactTextString(m) }
func (*VolumeDeleteResponse) ProtoMessage() {}
func (*VolumeDeleteResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{27} }
func (*VolumeDeleteResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{29} }
type ReplicateVolumeRequest struct {
VolumeId uint32 `protobuf:"varint,1,opt,name=volume_id,json=volumeId" json:"volume_id,omitempty"`
@ -599,7 +641,7 @@ type ReplicateVolumeRequest struct {
func (m *ReplicateVolumeRequest) Reset() { *m = ReplicateVolumeRequest{} }
func (m *ReplicateVolumeRequest) String() string { return proto.CompactTextString(m) }
func (*ReplicateVolumeRequest) ProtoMessage() {}
func (*ReplicateVolumeRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{28} }
func (*ReplicateVolumeRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{30} }
func (m *ReplicateVolumeRequest) GetVolumeId() uint32 {
if m != nil {
@ -642,7 +684,7 @@ type ReplicateVolumeResponse struct {
func (m *ReplicateVolumeResponse) Reset() { *m = ReplicateVolumeResponse{} }
func (m *ReplicateVolumeResponse) String() string { return proto.CompactTextString(m) }
func (*ReplicateVolumeResponse) ProtoMessage() {}
func (*ReplicateVolumeResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{29} }
func (*ReplicateVolumeResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{31} }
type CopyFileRequest struct {
VolumeId uint32 `protobuf:"varint,1,opt,name=volume_id,json=volumeId" json:"volume_id,omitempty"`
@ -653,7 +695,7 @@ type CopyFileRequest struct {
func (m *CopyFileRequest) Reset() { *m = CopyFileRequest{} }
func (m *CopyFileRequest) String() string { return proto.CompactTextString(m) }
func (*CopyFileRequest) ProtoMessage() {}
func (*CopyFileRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{30} }
func (*CopyFileRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{32} }
func (m *CopyFileRequest) GetVolumeId() uint32 {
if m != nil {
@ -683,7 +725,7 @@ type CopyFileResponse struct {
func (m *CopyFileResponse) Reset() { *m = CopyFileResponse{} }
func (m *CopyFileResponse) String() string { return proto.CompactTextString(m) }
func (*CopyFileResponse) ProtoMessage() {}
func (*CopyFileResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{31} }
func (*CopyFileResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{33} }
func (m *CopyFileResponse) GetFileContent() []byte {
if m != nil {
@ -699,7 +741,7 @@ type ReadVolumeFileStatusRequest struct {
func (m *ReadVolumeFileStatusRequest) Reset() { *m = ReadVolumeFileStatusRequest{} }
func (m *ReadVolumeFileStatusRequest) String() string { return proto.CompactTextString(m) }
func (*ReadVolumeFileStatusRequest) ProtoMessage() {}
func (*ReadVolumeFileStatusRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{32} }
func (*ReadVolumeFileStatusRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{34} }
func (m *ReadVolumeFileStatusRequest) GetVolumeId() uint32 {
if m != nil {
@ -719,7 +761,7 @@ type ReadVolumeFileStatusResponse struct {
func (m *ReadVolumeFileStatusResponse) Reset() { *m = ReadVolumeFileStatusResponse{} }
func (m *ReadVolumeFileStatusResponse) String() string { return proto.CompactTextString(m) }
func (*ReadVolumeFileStatusResponse) ProtoMessage() {}
func (*ReadVolumeFileStatusResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{33} }
func (*ReadVolumeFileStatusResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{35} }
func (m *ReadVolumeFileStatusResponse) GetVolumeId() uint32 {
if m != nil {
@ -766,7 +808,7 @@ type DiskStatus struct {
func (m *DiskStatus) Reset() { *m = DiskStatus{} }
func (m *DiskStatus) String() string { return proto.CompactTextString(m) }
func (*DiskStatus) ProtoMessage() {}
func (*DiskStatus) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{34} }
func (*DiskStatus) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{36} }
func (m *DiskStatus) GetDir() string {
if m != nil {
@ -809,7 +851,7 @@ type MemStatus struct {
func (m *MemStatus) Reset() { *m = MemStatus{} }
func (m *MemStatus) String() string { return proto.CompactTextString(m) }
func (*MemStatus) ProtoMessage() {}
func (*MemStatus) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{35} }
func (*MemStatus) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{37} }
func (m *MemStatus) GetGoroutines() int32 {
if m != nil {
@ -879,6 +921,8 @@ func init() {
proto.RegisterType((*AssignVolumeResponse)(nil), "volume_server_pb.AssignVolumeResponse")
proto.RegisterType((*VolumeSyncStatusRequest)(nil), "volume_server_pb.VolumeSyncStatusRequest")
proto.RegisterType((*VolumeSyncStatusResponse)(nil), "volume_server_pb.VolumeSyncStatusResponse")
proto.RegisterType((*VolumeFollowRequest)(nil), "volume_server_pb.VolumeFollowRequest")
proto.RegisterType((*VolumeFollowResponse)(nil), "volume_server_pb.VolumeFollowResponse")
proto.RegisterType((*VolumeSyncIndexRequest)(nil), "volume_server_pb.VolumeSyncIndexRequest")
proto.RegisterType((*VolumeSyncIndexResponse)(nil), "volume_server_pb.VolumeSyncIndexResponse")
proto.RegisterType((*VolumeSyncDataRequest)(nil), "volume_server_pb.VolumeSyncDataRequest")
@ -919,6 +963,7 @@ type VolumeServerClient interface {
DeleteCollection(ctx context.Context, in *DeleteCollectionRequest, opts ...grpc.CallOption) (*DeleteCollectionResponse, error)
AssignVolume(ctx context.Context, in *AssignVolumeRequest, opts ...grpc.CallOption) (*AssignVolumeResponse, error)
VolumeSyncStatus(ctx context.Context, in *VolumeSyncStatusRequest, opts ...grpc.CallOption) (*VolumeSyncStatusResponse, error)
VolumeFollow(ctx context.Context, in *VolumeFollowRequest, opts ...grpc.CallOption) (VolumeServer_VolumeFollowClient, error)
VolumeSyncIndex(ctx context.Context, in *VolumeSyncIndexRequest, opts ...grpc.CallOption) (VolumeServer_VolumeSyncIndexClient, error)
VolumeSyncData(ctx context.Context, in *VolumeSyncDataRequest, opts ...grpc.CallOption) (VolumeServer_VolumeSyncDataClient, error)
VolumeMount(ctx context.Context, in *VolumeMountRequest, opts ...grpc.CallOption) (*VolumeMountResponse, error)
@ -1009,8 +1054,40 @@ func (c *volumeServerClient) VolumeSyncStatus(ctx context.Context, in *VolumeSyn
return out, nil
}
func (c *volumeServerClient) VolumeFollow(ctx context.Context, in *VolumeFollowRequest, opts ...grpc.CallOption) (VolumeServer_VolumeFollowClient, error) {
stream, err := grpc.NewClientStream(ctx, &_VolumeServer_serviceDesc.Streams[0], c.cc, "/volume_server_pb.VolumeServer/VolumeFollow", opts...)
if err != nil {
return nil, err
}
x := &volumeServerVolumeFollowClient{stream}
if err := x.ClientStream.SendMsg(in); err != nil {
return nil, err
}
if err := x.ClientStream.CloseSend(); err != nil {
return nil, err
}
return x, nil
}
type VolumeServer_VolumeFollowClient interface {
Recv() (*VolumeFollowResponse, error)
grpc.ClientStream
}
type volumeServerVolumeFollowClient struct {
grpc.ClientStream
}
func (x *volumeServerVolumeFollowClient) Recv() (*VolumeFollowResponse, error) {
m := new(VolumeFollowResponse)
if err := x.ClientStream.RecvMsg(m); err != nil {
return nil, err
}
return m, nil
}
func (c *volumeServerClient) VolumeSyncIndex(ctx context.Context, in *VolumeSyncIndexRequest, opts ...grpc.CallOption) (VolumeServer_VolumeSyncIndexClient, error) {
stream, err := grpc.NewClientStream(ctx, &_VolumeServer_serviceDesc.Streams[0], c.cc, "/volume_server_pb.VolumeServer/VolumeSyncIndex", opts...)
stream, err := grpc.NewClientStream(ctx, &_VolumeServer_serviceDesc.Streams[1], c.cc, "/volume_server_pb.VolumeServer/VolumeSyncIndex", opts...)
if err != nil {
return nil, err
}
@ -1042,7 +1119,7 @@ func (x *volumeServerVolumeSyncIndexClient) Recv() (*VolumeSyncIndexResponse, er
}
func (c *volumeServerClient) VolumeSyncData(ctx context.Context, in *VolumeSyncDataRequest, opts ...grpc.CallOption) (VolumeServer_VolumeSyncDataClient, error) {
stream, err := grpc.NewClientStream(ctx, &_VolumeServer_serviceDesc.Streams[1], c.cc, "/volume_server_pb.VolumeServer/VolumeSyncData", opts...)
stream, err := grpc.NewClientStream(ctx, &_VolumeServer_serviceDesc.Streams[2], c.cc, "/volume_server_pb.VolumeServer/VolumeSyncData", opts...)
if err != nil {
return nil, err
}
@ -1119,7 +1196,7 @@ func (c *volumeServerClient) ReadVolumeFileStatus(ctx context.Context, in *ReadV
}
func (c *volumeServerClient) CopyFile(ctx context.Context, in *CopyFileRequest, opts ...grpc.CallOption) (VolumeServer_CopyFileClient, error) {
stream, err := grpc.NewClientStream(ctx, &_VolumeServer_serviceDesc.Streams[2], c.cc, "/volume_server_pb.VolumeServer/CopyFile", opts...)
stream, err := grpc.NewClientStream(ctx, &_VolumeServer_serviceDesc.Streams[3], c.cc, "/volume_server_pb.VolumeServer/CopyFile", opts...)
if err != nil {
return nil, err
}
@ -1162,6 +1239,7 @@ type VolumeServerServer interface {
DeleteCollection(context.Context, *DeleteCollectionRequest) (*DeleteCollectionResponse, error)
AssignVolume(context.Context, *AssignVolumeRequest) (*AssignVolumeResponse, error)
VolumeSyncStatus(context.Context, *VolumeSyncStatusRequest) (*VolumeSyncStatusResponse, error)
VolumeFollow(*VolumeFollowRequest, VolumeServer_VolumeFollowServer) error
VolumeSyncIndex(*VolumeSyncIndexRequest, VolumeServer_VolumeSyncIndexServer) error
VolumeSyncData(*VolumeSyncDataRequest, VolumeServer_VolumeSyncDataServer) error
VolumeMount(context.Context, *VolumeMountRequest) (*VolumeMountResponse, error)
@ -1320,6 +1398,27 @@ func _VolumeServer_VolumeSyncStatus_Handler(srv interface{}, ctx context.Context
return interceptor(ctx, in, info, handler)
}
func _VolumeServer_VolumeFollow_Handler(srv interface{}, stream grpc.ServerStream) error {
m := new(VolumeFollowRequest)
if err := stream.RecvMsg(m); err != nil {
return err
}
return srv.(VolumeServerServer).VolumeFollow(m, &volumeServerVolumeFollowServer{stream})
}
type VolumeServer_VolumeFollowServer interface {
Send(*VolumeFollowResponse) error
grpc.ServerStream
}
type volumeServerVolumeFollowServer struct {
grpc.ServerStream
}
func (x *volumeServerVolumeFollowServer) Send(m *VolumeFollowResponse) error {
return x.ServerStream.SendMsg(m)
}
func _VolumeServer_VolumeSyncIndex_Handler(srv interface{}, stream grpc.ServerStream) error {
m := new(VolumeSyncIndexRequest)
if err := stream.RecvMsg(m); err != nil {
@ -1531,6 +1630,11 @@ var _VolumeServer_serviceDesc = grpc.ServiceDesc{
},
},
Streams: []grpc.StreamDesc{
{
StreamName: "VolumeFollow",
Handler: _VolumeServer_VolumeFollow_Handler,
ServerStreams: true,
},
{
StreamName: "VolumeSyncIndex",
Handler: _VolumeServer_VolumeSyncIndex_Handler,
@ -1553,83 +1657,86 @@ var _VolumeServer_serviceDesc = grpc.ServiceDesc{
func init() { proto.RegisterFile("volume_server.proto", fileDescriptor0) }
var fileDescriptor0 = []byte{
// 1247 bytes of a gzipped FileDescriptorProto
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}

53
weed/server/volume_grpc_follow.go Normal file
View file

@ -0,0 +1,53 @@
package weed_server
import (
"fmt"
"github.com/chrislusf/seaweedfs/weed/storage/types"
"io"
"os"
"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
"github.com/chrislusf/seaweedfs/weed/storage"
)
func (vs *VolumeServer) VolumeFollow(req *volume_server_pb.VolumeFollowRequest, stream volume_server_pb.VolumeServer_VolumeFollowServer) error {
v := vs.store.GetVolume(storage.VolumeId(req.VolumeId))
if v == nil {
return fmt.Errorf("not found volume id %d", req.VolumeId)
}
stopOffset := v.Size()
foundOffset, isLastOne, err := v.BinarySearchByAppendAtNs(req.Since)
if err != nil {
return fmt.Errorf("fail to locate by appendAtNs: %s", err)
}
if isLastOne {
return nil
}
startOffset := int64(foundOffset) * int64(types.NeedleEntrySize)
buf := make([]byte, 1024*1024*2)
return sendFileContent(v.DataFile(), buf, startOffset, stopOffset, stream)
}
func sendFileContent(datFile *os.File, buf []byte, startOffset, stopOffset int64, stream volume_server_pb.VolumeServer_VolumeFollowServer) error {
var blockSizeLimit = int64(len(buf))
for i := int64(0); i < stopOffset-startOffset; i += blockSizeLimit {
n, readErr := datFile.ReadAt(buf, startOffset+i)
if readErr == nil || readErr == io.EOF {
resp := &volume_server_pb.VolumeFollowResponse{}
resp.FileContent = buf[i : i+int64(n)]
sendErr := stream.Send(resp)
if sendErr != nil {
return sendErr
}
} else {
return readErr
}
}
return nil
}

2
weed/storage/store_vacuum.go
View file

@ -20,7 +20,7 @@ func (s *Store) CompactVolume(vid VolumeId, preallocate int64) error {
}
func (s *Store) CommitCompactVolume(vid VolumeId) error {
if v := s.findVolume(vid); v != nil {
return v.commitCompact()
return v.CommitCompact()
}
return fmt.Errorf("volume id %d is not found during commit compact", vid)
}

220
weed/storage/volume_follow.go Normal file
View file

@ -0,0 +1,220 @@
package storage
import (
"context"
"fmt"
"github.com/chrislusf/seaweedfs/weed/operation"
"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
. "github.com/chrislusf/seaweedfs/weed/storage/types"
"google.golang.org/grpc"
"io"
"os"
)
// The volume sync with a master volume via 2 steps:
// 1. The slave checks master side to find subscription checkpoint
// to setup the replication.
// 2. The slave receives the updates from master
/*
Assume the slave volume needs to follow the master volume.
The master volume could be compacted, and could be many files ahead of
slave volume.
Step 0: // implemented in command/backup.go, to avoid dat file size overflow.
0.1 If slave compact version is less than the master, do a local compaction, and set
local compact version the same as the master.
0.2 If the slave size is still bigger than the master, discard local copy and do a full copy.
Step 1:
The slave volume ask the master by the last modification time t.
The master do a binary search in volume (use .idx as an array, and check the appendAtNs in .dat file),
to find the first entry with appendAtNs > t.
Step 2:
The master send content bytes to the slave. The bytes are not chunked by needle.
Step 3:
The slave generate the needle map for the new bytes. (This may be optimized to incrementally
update needle map when receiving new .dat bytes. But seems not necessary now.)
*/
func (v *Volume) Follow(volumeServer string, grpcDialOption grpc.DialOption) (error) {
ctx := context.Background()
startFromOffset := v.Size()
appendAtNs, err := v.findLastAppendAtNs()
if err != nil {
return err
}
err = operation.WithVolumeServerClient(volumeServer, grpcDialOption, func(client volume_server_pb.VolumeServerClient) error {
stream, err := client.VolumeFollow(ctx, &volume_server_pb.VolumeFollowRequest{
VolumeId: uint32(v.Id),
Since: appendAtNs,
})
if err != nil {
return err
}
v.dataFile.Seek(startFromOffset, io.SeekStart)
for {
resp, recvErr := stream.Recv()
if recvErr != nil {
if recvErr == io.EOF {
break
} else {
return recvErr
}
}
_, writeErr := v.dataFile.Write(resp.FileContent)
if writeErr != nil {
return writeErr
}
}
return nil
})
if err != nil {
return err
}
// TODO add to needle map
return nil
}
func (v *Volume) findLastAppendAtNs() (uint64, error) {
offset, err := v.locateLastAppendEntry()
if err != nil {
return 0, err
}
if offset == 0 {
return 0, nil
}
return v.readAppendAtNs(offset)
}
func (v *Volume) locateLastAppendEntry() (Offset, error) {
indexFile, e := os.OpenFile(v.FileName()+".idx", os.O_RDONLY, 0644)
if e != nil {
return 0, fmt.Errorf("cannot read %s.idx: %v", v.FileName(), e)
}
defer indexFile.Close()
fi, err := indexFile.Stat()
if err != nil {
return 0, fmt.Errorf("file %s stat error: %v", indexFile.Name(), err)
}
fileSize := fi.Size()
if fileSize%NeedleEntrySize != 0 {
return 0, fmt.Errorf("unexpected file %s size: %d", indexFile.Name(), fileSize)
}
if fileSize == 0 {
return 0, nil
}
bytes := make([]byte, NeedleEntrySize)
n, e := indexFile.ReadAt(bytes, fileSize-NeedleEntrySize)
if n != NeedleEntrySize {
return 0, fmt.Errorf("file %s read error: %v", indexFile.Name(), e)
}
_, offset, _ := IdxFileEntry(bytes)
return offset, nil
}
func (v *Volume) readAppendAtNs(offset Offset) (uint64, error) {
n, bodyLength, err := ReadNeedleHeader(v.dataFile, v.SuperBlock.version, int64(offset)*NeedlePaddingSize)
if err != nil {
return 0, fmt.Errorf("ReadNeedleHeader: %v", err)
}
err = n.ReadNeedleBody(v.dataFile, v.SuperBlock.version, int64(offset)*NeedlePaddingSize, bodyLength)
if err != nil {
return 0, fmt.Errorf("ReadNeedleBody offset %d: %v", int64(offset)*NeedlePaddingSize, err)
}
return n.AppendAtNs, nil
}
// on server side
func (v *Volume) BinarySearchByAppendAtNs(sinceNs uint64) (offset Offset, isLast bool, err error) {
indexFile, openErr := os.OpenFile(v.FileName()+".idx", os.O_RDONLY, 0644)
if openErr != nil {
err = fmt.Errorf("cannot read %s.idx: %v", v.FileName(), openErr)
return
}
defer indexFile.Close()
fi, statErr := indexFile.Stat()
if statErr != nil {
err = fmt.Errorf("file %s stat error: %v", indexFile.Name(), statErr)
return
}
fileSize := fi.Size()
if fileSize%NeedleEntrySize != 0 {
err = fmt.Errorf("unexpected file %s size: %d", indexFile.Name(), fileSize)
return
}
bytes := make([]byte, NeedleEntrySize)
entryCount := fileSize / NeedleEntrySize
l := int64(0)
h := entryCount
for l < h {
m := (l + h) / 2
if m == entryCount {
return 0, true, nil
}
// read the appendAtNs for entry m
offset, err = v.readAppendAtNsForIndexEntry(indexFile, bytes, m)
if err != nil {
return
}
mNs, nsReadErr := v.readAppendAtNs(offset)
if nsReadErr != nil {
err = nsReadErr
return
}
// move the boundary
if mNs <= sinceNs {
l = m + 1
} else {
h = m
}
}
if l == entryCount {
return 0, true, nil
}
offset, err = v.readAppendAtNsForIndexEntry(indexFile, bytes, l)
return offset, false, err
}
// bytes is of size NeedleEntrySize
func (v *Volume) readAppendAtNsForIndexEntry(indexFile *os.File, bytes []byte, m int64) (Offset, error) {
if _, readErr := indexFile.ReadAt(bytes, m*NeedleEntrySize); readErr != nil && readErr != io.EOF {
return 0, readErr
}
_, offset, _ := IdxFileEntry(bytes)
return offset, nil
}

39
weed/storage/volume_follow_test.go Normal file
View file

@ -0,0 +1,39 @@
package storage
import "testing"
func TestBinarySearch(t *testing.T) {
var testInput []int
testInput = []int{-1, 0, 3, 5, 9, 12}
if 3 != binarySearchForLargerThanTarget(testInput, 4) {
t.Errorf("failed to find target %d", 4)
}
if 3 != binarySearchForLargerThanTarget(testInput, 3) {
t.Errorf("failed to find target %d", 3)
}
if 6 != binarySearchForLargerThanTarget(testInput, 12) {
t.Errorf("failed to find target %d", 12)
}
if 1 != binarySearchForLargerThanTarget(testInput, -1) {
t.Errorf("failed to find target %d", -1)
}
if 0 != binarySearchForLargerThanTarget(testInput, -2) {
t.Errorf("failed to find target %d", -2)
}
}
func binarySearchForLargerThanTarget(nums []int, target int) int {
l := 0
h := len(nums)
for l < h {
m := (l + h) / 2
if nums[m] <= target {
l = m + 1
} else {
h = m
}
}
return l
}

24
weed/storage/volume_sync.go
View file

@ -26,23 +26,17 @@ Assume the slave volume needs to follow the master volume.
The master volume could be compacted, and could be many files ahead of
slave volume.
Step 0:
If slave compact version is less than the master, do a local compaction.
If the slave size is still less than the master, discard local copy and do a full copy.
Step 1:
The slave volume will ask the master volume for a snapshot
of (existing file entries, last offset, number of compacted times).
For each entry x in master existing file entries:
if x does not exist locally:
add x locally
For each entry y in local slave existing file entries:
if y does not exist on master:
delete y locally
The slave volume ask the master by the last modification time t.
The master do a binary search in volume (use .idx as an array, and check the appendAtNs in .dat file),
to find the first entry with appendAtNs > t.
Step 2:
After this, use the last offset and number of compacted times to request
the master volume to send a new file, and keep looping. If the number of
compacted times is changed, go back to step 1 (very likely this can be
optimized more later).
The master iterate following entries (including the first one) and send it to the follower.
*/
@ -58,7 +52,7 @@ func (v *Volume) Synchronize(volumeServer string, grpcDialOption grpc.DialOption
if err = v.Compact(0); err != nil {
return fmt.Errorf("Compact Volume before synchronizing %v", err)
}
if err = v.commitCompact(); err != nil {
if err = v.CommitCompact(); err != nil {
return fmt.Errorf("Commit Compact before synchronizing %v", err)
}
}

4
weed/storage/volume_vacuum.go
View file

@ -38,7 +38,7 @@ func (v *Volume) Compact2() error {
return v.copyDataBasedOnIndexFile(filePath+".cpd", filePath+".cpx")
}
func (v *Volume) commitCompact() error {
func (v *Volume) CommitCompact() error {
glog.V(0).Infof("Committing volume %d vacuuming...", v.Id)
v.dataFileAccessLock.Lock()
defer v.dataFileAccessLock.Unlock()
@ -53,7 +53,7 @@ func (v *Volume) commitCompact() error {
var e error
if e = v.makeupDiff(v.FileName()+".cpd", v.FileName()+".cpx", v.FileName()+".dat", v.FileName()+".idx"); e != nil {
glog.V(0).Infof("makeupDiff in commitCompact volume %d failed %v", v.Id, e)
glog.V(0).Infof("makeupDiff in CommitCompact volume %d failed %v", v.Id, e)
e = os.Remove(v.FileName() + ".cpd")
if e != nil {
return e

2
weed/storage/volume_vacuum_test.go
View file

@ -85,7 +85,7 @@ func TestCompaction(t *testing.T) {
doSomeWritesDeletes(i+beforeCommitFileCount, v, t, infos)
}
v.commitCompact()
v.CommitCompact()
v.Close()