diff --git a/weed/cluster/lock_client.go b/weed/cluster/lock_client.go
index de37476a9..c76b3c9bd 100644
--- a/weed/cluster/lock_client.go
+++ b/weed/cluster/lock_client.go
@@ -3,6 +3,7 @@ package cluster
 import (
 	"context"
 	"fmt"
+	"github.com/seaweedfs/seaweedfs/weed/cluster/lock_manager"
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/pb"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
@@ -42,7 +43,7 @@ func (lc *LockClient) NewLockWithTimeout(filer pb.ServerAddress, key string, loc
 
 // NewLock creates a lock with a very long duration
 func (lc *LockClient) NewLock(filer pb.ServerAddress, key string) (lock *LiveLock) {
-	return lc.doNewLock(filer, key, time.Duration(1<<63-1))
+	return lc.doNewLock(filer, key, lock_manager.MaxDuration)
 }
 
 func (lc *LockClient) doNewLock(filer pb.ServerAddress, key string, lockDuration time.Duration) (lock *LiveLock) {
diff --git a/weed/cluster/lock_manager/distributed_lock_manager.go b/weed/cluster/lock_manager/distributed_lock_manager.go
index 7577fb830..7061dfd1a 100644
--- a/weed/cluster/lock_manager/distributed_lock_manager.go
+++ b/weed/cluster/lock_manager/distributed_lock_manager.go
@@ -6,21 +6,29 @@ import (
 	"time"
 )
 
+const MaxDuration = 1<<63 - 1
+
 var NoLockServerError = fmt.Errorf("no lock server found")
 
 type DistributedLockManager struct {
 	lockManager *LockManager
 	LockRing    *LockRing
+	Host        pb.ServerAddress
 }
 
-func NewDistributedLockManager() *DistributedLockManager {
+func NewDistributedLockManager(host pb.ServerAddress) *DistributedLockManager {
 	return &DistributedLockManager{
 		lockManager: NewLockManager(),
 		LockRing:    NewLockRing(time.Second * 5),
+		Host:        host,
 	}
 }
 
-func (dlm *DistributedLockManager) Lock(host pb.ServerAddress, key string, expiredAtNs int64, token string) (renewToken string, movedTo pb.ServerAddress, err error) {
+func (dlm *DistributedLockManager) Lock(key string, token string) (renewToken string, movedTo pb.ServerAddress, err error) {
+	return dlm.LockWithTimeout(key, MaxDuration, token)
+}
+
+func (dlm *DistributedLockManager) LockWithTimeout(key string, expiredAtNs int64, token string) (renewToken string, movedTo pb.ServerAddress, err error) {
 	servers := dlm.LockRing.GetSnapshot()
 	if servers == nil {
 		err = NoLockServerError
@@ -28,7 +36,7 @@ func (dlm *DistributedLockManager) Lock(host pb.ServerAddress, key string, expir
 	}
 
 	server := hashKeyToServer(key, servers)
-	if server != host {
+	if server != dlm.Host {
 		movedTo = server
 		return
 	}
@@ -36,7 +44,7 @@ func (dlm *DistributedLockManager) Lock(host pb.ServerAddress, key string, expir
 	return
 }
 
-func (dlm *DistributedLockManager) Unlock(host pb.ServerAddress, key string, token string) (movedTo pb.ServerAddress, err error) {
+func (dlm *DistributedLockManager) Unlock(key string, token string) (movedTo pb.ServerAddress, err error) {
 	servers := dlm.LockRing.GetSnapshot()
 	if servers == nil {
 		err = NoLockServerError
@@ -44,7 +52,7 @@ func (dlm *DistributedLockManager) Unlock(host pb.ServerAddress, key string, tok
 	}
 
 	server := hashKeyToServer(key, servers)
-	if server != host {
+	if server != dlm.Host {
 		movedTo = server
 		return
 	}
@@ -57,12 +65,20 @@ func (dlm *DistributedLockManager) Unlock(host pb.ServerAddress, key string, tok
 func (dlm *DistributedLockManager) InsertLock(key string, expiredAtNs int64, token string) {
 	dlm.lockManager.InsertLock(key, expiredAtNs, token)
 }
-func (dlm *DistributedLockManager) SelectNotOwnedLocks(host pb.ServerAddress, servers []pb.ServerAddress) (locks []*Lock) {
+func (dlm *DistributedLockManager) SelectNotOwnedLocks(servers []pb.ServerAddress) (locks []*Lock) {
 	return dlm.lockManager.SelectLocks(func(key string) bool {
 		server := hashKeyToServer(key, servers)
-		return server != host
+		return server != dlm.Host
 	})
 }
 func (dlm *DistributedLockManager) CalculateTargetServer(key string, servers []pb.ServerAddress) pb.ServerAddress {
 	return hashKeyToServer(key, servers)
 }
+
+func (dlm *DistributedLockManager) IsLocal(key string) bool {
+	servers := dlm.LockRing.GetSnapshot()
+	if len(servers) <= 1 {
+		return true
+	}
+	return hashKeyToServer(key, servers) == dlm.Host
+}
diff --git a/weed/filer/filer.go b/weed/filer/filer.go
index 7625d4bde..82b822971 100644
--- a/weed/filer/filer.go
+++ b/weed/filer/filer.go
@@ -61,7 +61,7 @@ func NewFiler(masters map[string]pb.ServerAddress, grpcDialOption grpc.DialOptio
 		FilerConf:           NewFilerConf(),
 		RemoteStorage:       NewFilerRemoteStorage(),
 		UniqueFilerId:       util.RandomInt32(),
-		Dlm:                 lock_manager.NewDistributedLockManager(),
+		Dlm:                 lock_manager.NewDistributedLockManager(filerHost),
 	}
 	if f.UniqueFilerId < 0 {
 		f.UniqueFilerId = -f.UniqueFilerId
diff --git a/weed/server/filer_grpc_server_dlm.go b/weed/server/filer_grpc_server_dlm.go
index 6cdd69e42..5da8d9718 100644
--- a/weed/server/filer_grpc_server_dlm.go
+++ b/weed/server/filer_grpc_server_dlm.go
@@ -16,7 +16,7 @@ func (fs *FilerServer) Lock(ctx context.Context, req *filer_pb.LockRequest) (res
 
 	var movedTo pb.ServerAddress
 	expiredAtNs := time.Now().Add(time.Duration(req.SecondsToLock) * time.Second).UnixNano()
-	resp.RenewToken, movedTo, err = fs.filer.Dlm.Lock(fs.option.Host, req.Name, expiredAtNs, req.RenewToken)
+	resp.RenewToken, movedTo, err = fs.filer.Dlm.LockWithTimeout(req.Name, expiredAtNs, req.RenewToken)
 	if !req.IsMoved && movedTo != "" {
 		err = pb.WithFilerClient(false, 0, movedTo, fs.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 			secondResp, err := client.Lock(context.Background(), &filer_pb.LockRequest{
@@ -50,7 +50,7 @@ func (fs *FilerServer) Unlock(ctx context.Context, req *filer_pb.UnlockRequest)
 	resp = &filer_pb.UnlockResponse{}
 
 	var movedTo pb.ServerAddress
-	movedTo, err = fs.filer.Dlm.Unlock(fs.option.Host, req.Name, req.RenewToken)
+	movedTo, err = fs.filer.Dlm.Unlock(req.Name, req.RenewToken)
 
 	if !req.IsMoved && movedTo != "" {
 		err = pb.WithFilerClient(false, 0, movedTo, fs.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
@@ -87,7 +87,7 @@ func (fs *FilerServer) TransferLocks(ctx context.Context, req *filer_pb.Transfer
 }
 
 func (fs *FilerServer) OnDlmChangeSnapshot(snapshot []pb.ServerAddress) {
-	locks := fs.filer.Dlm.SelectNotOwnedLocks(fs.option.Host, snapshot)
+	locks := fs.filer.Dlm.SelectNotOwnedLocks(snapshot)
 	if len(locks) == 0 {
 		return
 	}