5 files changed, 15 insertions, 19 deletions
diff --git a/weed/filer/entry.go b/weed/filer/entry.go
index 45ede0e8e..421e51432 100644
--- a/weed/filer/entry.go
+++ b/weed/filer/entry.go
@@ -64,7 +64,7 @@ func (entry *Entry) ToProtoEntry() *filer_pb.Entry {
 		Attributes:      EntryAttributeToPb(entry),
 		Chunks:          entry.Chunks,
 		Extended:        entry.Extended,
-		HardLinkId:      int64(entry.HardLinkId),
+		HardLinkId:      entry.HardLinkId,
 		HardLinkCounter: entry.HardLinkCounter,
 	}
 }
diff --git a/weed/filer/entry_codec.go b/weed/filer/entry_codec.go
index 21531ad7a..884fb2670 100644
--- a/weed/filer/entry_codec.go
+++ b/weed/filer/entry_codec.go
@@ -16,7 +16,7 @@ func (entry *Entry) EncodeAttributesAndChunks() ([]byte, error) {
 		Attributes:      EntryAttributeToPb(entry),
 		Chunks:          entry.Chunks,
 		Extended:        entry.Extended,
-		HardLinkId:      int64(entry.HardLinkId),
+		HardLinkId:      entry.HardLinkId,
 		HardLinkCounter: entry.HardLinkCounter,
 	}
 	return proto.Marshal(message)
@@ -36,7 +36,7 @@ func (entry *Entry) DecodeAttributesAndChunks(blob []byte) error {
 
 	entry.Chunks = message.Chunks
 
-	entry.HardLinkId = HardLinkId(message.HardLinkId)
+	entry.HardLinkId = message.HardLinkId
 	entry.HardLinkCounter = message.HardLinkCounter
 
 	return nil
@@ -116,7 +116,7 @@ func EqualEntry(a, b *Entry) bool {
 		}
 	}
 
-	if a.HardLinkId != b.HardLinkId {
+	if !bytes.Equal(a.HardLinkId, b.HardLinkId) {
 		return false
 	}
 	if a.HardLinkCounter != b.HardLinkCounter {
diff --git a/weed/filer/filer_delete_entry.go b/weed/filer/filer_delete_entry.go
index 693b93f8b..6c9ff56d3 100644
--- a/weed/filer/filer_delete_entry.go
+++ b/weed/filer/filer_delete_entry.go
@@ -10,12 +10,7 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/util"
 )
 
-type HardLinkId int64
-func (hardLinkId HardLinkId) Key() []byte{
-	bytes := make([]byte, 8)
-	util.Uint64toBytes(bytes, uint64(hardLinkId))
-	return bytes
-}
+type HardLinkId []byte
 
 func (f *Filer) DeleteEntryMetaAndData(ctx context.Context, p util.FullPath, isRecursive, ignoreRecursiveError, shouldDeleteChunks, isFromOtherCluster bool, signatures []int32) (err error) {
 	if p == "/" {
@@ -95,7 +90,7 @@ func (f *Filer) doBatchDeleteFolderMetaAndData(ctx context.Context, entry *Entry
 				hardlinkIds = append(hardlinkIds, dirHardLinkIds...)
 			} else {
 				f.NotifyUpdateEvent(ctx, sub, nil, shouldDeleteChunks, isFromOtherCluster, nil)
-				if sub.HardLinkId != 0 {
+				if len(sub.HardLinkId) != 0 {
 					// hard link chunk data are deleted separately
 					hardlinkIds = append(hardlinkIds, sub.HardLinkId)
 				} else {
diff --git a/weed/filer/filerstore.go b/weed/filer/filerstore.go
index 888168581..11e30878d 100644
--- a/weed/filer/filerstore.go
+++ b/weed/filer/filerstore.go
@@ -135,7 +135,7 @@ func (fsw *FilerStoreWrapper) DeleteEntry(ctx context.Context, fp util.FullPath)
 	if findErr == filer_pb.ErrNotFound {
 		return nil
 	}
-	if existingEntry.HardLinkId != 0 {
+	if len(existingEntry.HardLinkId) != 0 {
 		// remove hard link
 		if err = fsw.DeleteHardLink(ctx, existingEntry.HardLinkId); err != nil {
 			return err
diff --git a/weed/filer/filerstore_hardlink.go b/weed/filer/filerstore_hardlink.go
index ec768b9cb..9cb32f27f 100644
--- a/weed/filer/filerstore_hardlink.go
+++ b/weed/filer/filerstore_hardlink.go
@@ -1,6 +1,7 @@
 package filer
 
 import (
+	"bytes"
 	"context"
 	"fmt"
 	"github.com/chrislusf/seaweedfs/weed/glog"
@@ -8,7 +9,7 @@ import (
 )
 
 func (fsw *FilerStoreWrapper) handleUpdateToHardLinks(ctx context.Context, entry *Entry) error {
-	if entry.HardLinkId == 0 {
+	if len(entry.HardLinkId) == 0 {
 		return nil
 	}
 	// handle hard links
@@ -23,7 +24,7 @@ func (fsw *FilerStoreWrapper) handleUpdateToHardLinks(ctx context.Context, entry
 	}
 
 	// remove old hard link
-	if err == nil && existingEntry.HardLinkId != entry.HardLinkId {
+	if err == nil && bytes.Compare(existingEntry.HardLinkId, entry.HardLinkId) != 0 {
 		if err = fsw.DeleteHardLink(ctx, existingEntry.HardLinkId); err != nil {
 			return err
 		}
@@ -32,10 +33,10 @@ func (fsw *FilerStoreWrapper) handleUpdateToHardLinks(ctx context.Context, entry
 }
 
 func (fsw *FilerStoreWrapper) setHardLink(ctx context.Context, entry *Entry) error {
-	if entry.HardLinkId == 0 {
+	if len(entry.HardLinkId) == 0 {
 		return nil
 	}
-	key := entry.HardLinkId.Key()
+	key := entry.HardLinkId
 
 	newBlob, encodeErr := entry.EncodeAttributesAndChunks()
 	if encodeErr != nil {
@@ -46,10 +47,10 @@ func (fsw *FilerStoreWrapper) setHardLink(ctx context.Context, entry *Entry) err
 }
 
 func (fsw *FilerStoreWrapper) maybeReadHardLink(ctx context.Context, entry *Entry) error {
-	if entry.HardLinkId == 0 {
+	if len(entry.HardLinkId) == 0 {
 		return nil
 	}
-	key := entry.HardLinkId.Key()
+	key := entry.HardLinkId
 
 	value, err := fsw.KvGet(ctx, key)
 	if err != nil {
@@ -66,7 +67,7 @@ func (fsw *FilerStoreWrapper) maybeReadHardLink(ctx context.Context, entry *Entr
 }
 
 func (fsw *FilerStoreWrapper) DeleteHardLink(ctx context.Context, hardLinkId HardLinkId) error {
-	key := hardLinkId.Key()
+	key := hardLinkId
 	value, err := fsw.KvGet(ctx, key)
 	if err == ErrKvNotFound {
 		return nil