diff --git a/weed/replication/sink/s3sink/s3_sink.go b/weed/replication/sink/s3sink/s3_sink.go
index 6b3a9c1ef..445800275 100644
--- a/weed/replication/sink/s3sink/s3_sink.go
+++ b/weed/replication/sink/s3sink/s3_sink.go
@@ -99,7 +99,7 @@ func (s3sink *S3Sink) DeleteEntry(key string, isDirectory, deleteIncludeChunks b
 	key = cleanKey(key)
 
 	if isDirectory {
-		key = key + "/"
+		return nil
 	}
 
 	return s3sink.deleteObject(key)
diff --git a/weed/replication/sink/s3sink/s3_write.go b/weed/replication/sink/s3sink/s3_write.go
index 480859db8..256fc659c 100644
--- a/weed/replication/sink/s3sink/s3_write.go
+++ b/weed/replication/sink/s3sink/s3_write.go
@@ -1,18 +1,9 @@
 package S3Sink
 
 import (
-	"bytes"
-	"context"
-	"fmt"
-	"io"
-
 	"github.com/aws/aws-sdk-go/aws"
-	"github.com/aws/aws-sdk-go/aws/awserr"
 	"github.com/aws/aws-sdk-go/service/s3"
-	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/glog"
-	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
-	"github.com/seaweedfs/seaweedfs/weed/util"
 )
 
 func (s3sink *S3Sink) deleteObject(key string) error {
@@ -32,152 +23,3 @@ func (s3sink *S3Sink) deleteObject(key string) error {
 	return err
 
 }
-
-func (s3sink *S3Sink) createMultipartUpload(key string, entry *filer_pb.Entry) (uploadId string, err error) {
-	input := &s3.CreateMultipartUploadInput{
-		Bucket:      aws.String(s3sink.bucket),
-		Key:         aws.String(key),
-		ContentType: aws.String(entry.Attributes.Mime),
-	}
-	if s3sink.acl != "" {
-		input.ACL = aws.String(s3sink.acl)
-	}
-
-	result, err := s3sink.conn.CreateMultipartUpload(input)
-
-	if err == nil {
-		glog.V(2).Infof("[%s] createMultipartUpload %s: %v", s3sink.bucket, key, result)
-	} else {
-		glog.Errorf("[%s] createMultipartUpload %s: %v", s3sink.bucket, key, err)
-		return "", err
-	}
-
-	return *result.UploadId, err
-}
-
-func (s3sink *S3Sink) abortMultipartUpload(key, uploadId string) error {
-	input := &s3.AbortMultipartUploadInput{
-		Bucket:   aws.String(s3sink.bucket),
-		Key:      aws.String(key),
-		UploadId: aws.String(uploadId),
-	}
-
-	result, err := s3sink.conn.AbortMultipartUpload(input)
-	if err != nil {
-		if aerr, ok := err.(awserr.Error); ok {
-			switch aerr.Code() {
-			case s3.ErrCodeNoSuchUpload:
-				glog.Errorf("[%s] abortMultipartUpload %s: %v %v", s3sink.bucket, key, s3.ErrCodeNoSuchUpload, aerr.Error())
-			default:
-				glog.Errorf("[%s] abortMultipartUpload %s: %v", s3sink.bucket, key, aerr.Error())
-			}
-		} else {
-			// Print the error, cast err to awserr.Error to get the Code and
-			// Message from an error.
-			glog.Errorf("[%s] abortMultipartUpload %s: %v", s3sink.bucket, key, aerr.Error())
-		}
-		return err
-	}
-
-	glog.V(0).Infof("[%s] abortMultipartUpload %s: %v", s3sink.bucket, key, result)
-
-	return nil
-}
-
-// To complete multipart upload
-func (s3sink *S3Sink) completeMultipartUpload(ctx context.Context, key, uploadId string, parts []*s3.CompletedPart) error {
-	input := &s3.CompleteMultipartUploadInput{
-		Bucket:   aws.String(s3sink.bucket),
-		Key:      aws.String(key),
-		UploadId: aws.String(uploadId),
-		MultipartUpload: &s3.CompletedMultipartUpload{
-			Parts: parts,
-		},
-	}
-
-	result, err := s3sink.conn.CompleteMultipartUpload(input)
-	if err == nil {
-		glog.V(2).Infof("[%s] completeMultipartUpload %s: %v", s3sink.bucket, key, result)
-	} else {
-		glog.Errorf("[%s] completeMultipartUpload %s: %v", s3sink.bucket, key, err)
-		return fmt.Errorf("[%s] completeMultipartUpload %s: %v", s3sink.bucket, key, err)
-	}
-
-	return nil
-}
-
-// To upload a part
-func (s3sink *S3Sink) uploadPart(key, uploadId string, partId int, chunk *filer.ChunkView) (*s3.CompletedPart, error) {
-	var readSeeker io.ReadSeeker
-
-	readSeeker, err := s3sink.buildReadSeeker(chunk)
-	if err != nil {
-		glog.Errorf("[%s] uploadPart %s %d read: %v", s3sink.bucket, key, partId, err)
-		return nil, fmt.Errorf("[%s] uploadPart %s %d read: %v", s3sink.bucket, key, partId, err)
-	}
-
-	return s3sink.doUploadPart(key, uploadId, partId, readSeeker)
-}
-
-func (s3sink *S3Sink) doUploadPart(key, uploadId string, partId int, readSeeker io.ReadSeeker) (*s3.CompletedPart, error) {
-
-	input := &s3.UploadPartInput{
-		Body:       readSeeker,
-		Bucket:     aws.String(s3sink.bucket),
-		Key:        aws.String(key),
-		PartNumber: aws.Int64(int64(partId)),
-		UploadId:   aws.String(uploadId),
-	}
-
-	result, err := s3sink.conn.UploadPart(input)
-	if err == nil {
-		glog.V(2).Infof("[%s] uploadPart %s %d upload: %v", s3sink.bucket, key, partId, result)
-	} else {
-		glog.Errorf("[%s] uploadPart %s %d upload: %v", s3sink.bucket, key, partId, err)
-	}
-
-	part := &s3.CompletedPart{
-		ETag:       result.ETag,
-		PartNumber: aws.Int64(int64(partId)),
-	}
-
-	return part, err
-}
-
-// To upload a part by copying byte range from an existing object as data source
-func (s3sink *S3Sink) uploadPartCopy(key, uploadId string, partId int64, copySource string, sourceStart, sourceStop int) error {
-	input := &s3.UploadPartCopyInput{
-		Bucket:          aws.String(s3sink.bucket),
-		CopySource:      aws.String(fmt.Sprintf("/%s/%s", s3sink.bucket, copySource)),
-		CopySourceRange: aws.String(fmt.Sprintf("bytes=%d-%d", sourceStart, sourceStop)),
-		Key:             aws.String(key),
-		PartNumber:      aws.Int64(partId),
-		UploadId:        aws.String(uploadId),
-	}
-
-	result, err := s3sink.conn.UploadPartCopy(input)
-	if err == nil {
-		glog.V(0).Infof("[%s] uploadPartCopy %s %d: %v", s3sink.bucket, key, partId, result)
-	} else {
-		glog.Errorf("[%s] uploadPartCopy %s %d: %v", s3sink.bucket, key, partId, err)
-	}
-
-	return err
-}
-
-func (s3sink *S3Sink) buildReadSeeker(chunk *filer.ChunkView) (io.ReadSeeker, error) {
-	fileUrls, err := s3sink.filerSource.LookupFileId(chunk.FileId)
-	if err != nil {
-		return nil, err
-	}
-	buf := make([]byte, chunk.Size)
-	for _, fileUrl := range fileUrls {
-		_, err = util.ReadUrl(fileUrl, chunk.CipherKey, chunk.IsGzipped, false, chunk.Offset, int(chunk.Size), buf)
-		if err != nil {
-			glog.V(1).Infof("read from %s: %v", fileUrl, err)
-		} else {
-			break
-		}
-	}
-	return bytes.NewReader(buf), nil
-}