} else {
				textPartData = textData[j*partSize:]
			}
			md5hex := getMD5Hash(textPartData)
			var partInfo PartInfo
			partInfo, err = obj.PutObjectPart(context.Background(), bucket, object, res.UploadID, j,
				mustGetPutObjReader(b, bytes.NewReader(textPartData), int64(len(textPartData)), md5hex, sha256hex), ObjectOptions{})
			if err != nil {
				b.Fatal(err)
			}
			if partInfo.ETag != md5hex {

	"response-content-encoding",
	"response-content-language",
	"response-content-type",
	"response-expires",
	"retention",
	"select",
	"select-type",
	"tagging",
	"torrent",
	"uploadId",
	"uploads",
	"versionId",
	"versioning",
	"versions",
	"website",
}

// Signature and API related constants.
const (
	signV2Algorithm = "AWS"
)

// AWS S3 Signature V2 calculation rule is give here:

			SrcPoolIdx:   idx,
			DataMovement: true,
		})
		if err != nil {
			return fmt.Errorf("decommissionObject: NewMultipartUpload() %w", err)
		}
		defer z.AbortMultipartUpload(ctx, bucket, objInfo.Name, res.UploadID, ObjectOptions{NoAuditLog: true})
		parts := make([]CompletePart, len(objInfo.Parts))
		for i, part := range objInfo.Parts {
			hr, err := hash.NewReader(ctx, io.LimitReader(gr, part.Size), part.Size, "", "", part.ActualSize)

	return err
}

func (client *peerRESTClient) DeleteUploadID(ctx context.Context, uploadID string) error {
	conn := client.gridConn()
	if conn == nil {
		return nil
	}
	_, err := cleanupUploadIDCacheMetaRPC.Call(ctx, conn, grid.NewMSSWith(map[string]string{
		peerRESTUploadID: uploadID,
	}))
	return err
}

func (client *peerRESTClient) StopRebalance(ctx context.Context) error {

// given uploadID from cache
func (sys *NotificationSys) DeleteUploadID(ctx context.Context, uploadID string) {
	ng := WithNPeers(len(sys.peerClients))
	for idx, client := range sys.peerClients {
		if client == nil {
			continue
		}
		client := client
		ng.Go(ctx, func() error {
			return client.DeleteUploadID(ctx, uploadID)
		}, idx, *client.host)
	}

	}

	pools, ok := objAPI.(*erasureServerPools)
	if !ok {
		return
	}

	// No need to return errors, this is not a highly strict operation.
	uploadID := mss.Get(peerRESTUploadID)
	if uploadID != "" {
		pools.ClearUploadID(uploadID)
	}

	return
}

func (s *peerRESTServer) StopRebalanceHandler(mss *grid.MSS) (np grid.NoPayload, nerr *grid.RemoteErr) {
	objAPI := newObjectLayerFn()

	_, err = objLayer.PutObjectPart(ctx, "bucket1", "mpartObj1", res.UploadID, 1, mustGetPutObjReader(t, bytes.NewReader(fiveMBBytes), 5*humanize.MiByte, md5Hex, ""), opts)
	if err != nil {
		t.Fatal(err)
	}
	// PutObjectPart should succeed even if part already exists. ref: https://github.com/minio/minio/issues/1930

	opts.Internal.SourceMTime = time.Time{} // this value is saved properly in CompleteMultipartUpload()
	var uploadID string
	attempts := 1
	for attempts <= 3 {
		nctx, cancel := context.WithTimeout(ctx, time.Minute)
		uploadID, err = c.NewMultipartUpload(nctx, bucket, object, opts)
		cancel()
		if err == nil {
			break
		}

// the simplified multipart backend which is a flat hierarchy now.
// In .minio.sys/multipart we have:
// sha256(bucket/object)/uploadID/[xl.meta, part.1, part.2 ....]
type formatErasureV3 struct {
	formatMetaV1
	Erasure struct {
		Version string `json:"version"` // Version of 'xl' format.

		if err != nil {
			return setRestoreHeaderFn(oi, err)
		}
		pInfo, err := er.PutObjectPart(ctx, bucket, object, res.UploadID, partInfo.Number, NewPutObjReader(hr), ObjectOptions{})
		if err != nil {
			return setRestoreHeaderFn(oi, err)
		}
		if pInfo.Size != partInfo.Size {