diff --git a/weed/command/filer_copy.go b/weed/command/filer_copy.go
index 5fbddc07e..977e2a6b8 100644
--- a/weed/command/filer_copy.go
+++ b/weed/command/filer_copy.go
@@ -331,8 +331,6 @@ func (worker *FileCopyWorker) uploadFileAsOne(task FileCopyTask, f *os.File) err
 	var mimeType string
 
 	var chunks []*filer_pb.FileChunk
-	var assignResult *filer_pb.AssignVolumeResponse
-	var assignError error
 
 	if task.fileMode&os.ModeDir == 0 && task.fileSize > 0 {
 
@@ -342,66 +340,32 @@ func (worker *FileCopyWorker) uploadFileAsOne(task FileCopyTask, f *os.File) err
 			return err
 		}
 
-		err = util.Retry("upload", func() error {
-			// assign a volume
-			assignErr := pb.WithGrpcFilerClient(false, worker.filerAddress, worker.options.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
-
-				request := &filer_pb.AssignVolumeRequest{
-					Count:       1,
-					Replication: *worker.options.replication,
-					Collection:  *worker.options.collection,
-					TtlSec:      worker.options.ttlSec,
-					DiskType:    *worker.options.diskType,
-					Path:        task.destinationUrlPath,
-				}
-
-				assignResult, assignError = client.AssignVolume(context.Background(), request)
-				if assignError != nil {
-					return fmt.Errorf("assign volume failure %v: %v", request, assignError)
-				}
-				if assignResult.Error != "" {
-					return fmt.Errorf("assign volume failure %v: %v", request, assignResult.Error)
-				}
-				if assignResult.Location.Url == "" {
-					return fmt.Errorf("assign volume failure %v: %v", request, assignResult)
-				}
-				return nil
-			})
-			if assignErr != nil {
-				return assignErr
-			}
-
-			// upload data
-			targetUrl := "http://" + assignResult.Location.Url + "/" + assignResult.FileId
-			uploadOption := &operation.UploadOption{
-				UploadUrl:         targetUrl,
+		finalFileId, uploadResult, flushErr, _ := operation.UploadWithRetry(
+			worker,
+			&filer_pb.AssignVolumeRequest{
+				Count:       1,
+				Replication: *worker.options.replication,
+				Collection:  *worker.options.collection,
+				TtlSec:      worker.options.ttlSec,
+				DiskType:    *worker.options.diskType,
+				Path:        task.destinationUrlPath,
+			},
+			&operation.UploadOption{
 				Filename:          fileName,
 				Cipher:            worker.options.cipher,
 				IsInputCompressed: false,
 				MimeType:          mimeType,
 				PairMap:           nil,
-				Jwt:               security.EncodedJwt(assignResult.Auth),
-			}
-			uploadResult, err := operation.UploadData(data, uploadOption)
-			if err != nil {
-				return fmt.Errorf("upload data %v to %s: %v\n", fileName, targetUrl, err)
-			}
-			if uploadResult.Error != "" {
-				return fmt.Errorf("upload %v to %s result: %v\n", fileName, targetUrl, uploadResult.Error)
-			}
-			if *worker.options.verbose {
-				fmt.Printf("uploaded %s to %s\n", fileName, targetUrl)
-			}
-
-			fmt.Printf("copied %s => http://%s%s%s\n", f.Name(), worker.filerAddress.ToHttpAddress(), task.destinationUrlPath, fileName)
-			chunks = append(chunks, uploadResult.ToPbFileChunk(assignResult.FileId, 0))
-
-			return nil
-		})
-		if err != nil {
-			return fmt.Errorf("upload %v: %v\n", fileName, err)
+			},
+			func(host, fileId string) string {
+				return fmt.Sprintf("http://%s/%s", host, fileId)
+			},
+			util.NewBytesReader(data),
+		)
+		if flushErr != nil {
+			return flushErr
 		}
-
+		chunks = append(chunks, uploadResult.ToPbFileChunk(finalFileId, 0))
 	}
 
 	if err := pb.WithGrpcFilerClient(false, worker.filerAddress, worker.options.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {