diff --git a/weed/filer2/filer.go b/weed/filer2/filer.go
index 428589975..014eb19e9 100644
--- a/weed/filer2/filer.go
+++ b/weed/filer2/filer.go
@@ -14,6 +14,7 @@ import (
 
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/chrislusf/seaweedfs/weed/queue"
 	"github.com/chrislusf/seaweedfs/weed/util"
 	"github.com/chrislusf/seaweedfs/weed/wdclient"
 )
@@ -35,7 +36,7 @@ type Filer struct {
 	DirQueuesPath       string
 	buckets             *FilerBuckets
 	Cipher              bool
-	metaLogBuffer       *LogBuffer
+	metaLogBuffer       *queue.LogBuffer
 }
 
 func NewFiler(masters []string, grpcDialOption grpc.DialOption, filerGrpcPort uint32) *Filer {
@@ -45,7 +46,7 @@ func NewFiler(masters []string, grpcDialOption grpc.DialOption, filerGrpcPort ui
 		fileIdDeletionQueue: util.NewUnboundedQueue(),
 		GrpcDialOption:      grpcDialOption,
 	}
-	f.metaLogBuffer = NewLogBuffer(time.Minute, f.logFlushFunc)
+	f.metaLogBuffer = queue.NewLogBuffer(time.Minute, f.logFlushFunc)
 
 	go f.loopProcessingDeletion()
 
@@ -312,5 +313,6 @@ func (f *Filer) cacheSetDirectory(dirpath string, dirEntry *Entry, level int) {
 }
 
 func (f *Filer) Shutdown() {
+	f.metaLogBuffer.Shutdown()
 	f.store.Shutdown()
 }
diff --git a/weed/filer2/filer_notify.go b/weed/filer2/filer_notify.go
index 54c3d0c48..e808e45f0 100644
--- a/weed/filer2/filer_notify.go
+++ b/weed/filer2/filer_notify.go
@@ -3,7 +3,6 @@ package filer2
 import (
 	"fmt"
 	"strings"
-	"sync"
 	"time"
 
 	"github.com/golang/protobuf/proto"
@@ -78,72 +77,3 @@ func (f *Filer) logFlushFunc(startTime, stopTime time.Time, buf []byte) {
 	}
 }
 
-type LogBuffer struct {
-	buf           []byte
-	pos           int
-	startTime     time.Time
-	stopTime      time.Time
-	sizeBuf       []byte
-	flushInterval time.Duration
-	flushFn       func(startTime, stopTime time.Time, buf []byte)
-	sync.Mutex
-}
-
-func NewLogBuffer(flushInterval time.Duration, flushFn func(startTime, stopTime time.Time, buf []byte)) *LogBuffer {
-	lb := &LogBuffer{
-		buf:           make([]byte, 4*0124*1024),
-		sizeBuf:       make([]byte, 4),
-		flushInterval: 2 * time.Second, // flushInterval,
-		flushFn:       flushFn,
-	}
-	go lb.loopFlush()
-	return lb
-}
-
-func (m *LogBuffer) loopFlush() {
-	for {
-		m.Lock()
-		m.flush()
-		m.Unlock()
-		time.Sleep(m.flushInterval)
-	}
-}
-
-func (m *LogBuffer) flush() {
-	if m.flushFn != nil && m.pos > 0 {
-		m.flushFn(m.startTime, m.stopTime, m.buf[:m.pos])
-		m.pos = 0
-	}
-}
-
-func (m *LogBuffer) AddToBuffer(ts time.Time, key, data []byte) {
-
-	logEntry := &filer_pb.LogEntry{
-		TsNs:             ts.UnixNano(),
-		PartitionKeyHash: util.HashToInt32(key),
-		Data:             data,
-	}
-
-	logEntryData, _ := proto.Marshal(logEntry)
-
-	size := len(logEntryData)
-
-	m.Lock()
-	defer m.Unlock()
-
-	if m.pos == 0 {
-		m.startTime = ts
-	}
-
-	if m.startTime.Add(m.flushInterval).Before(ts) || len(m.buf)-m.pos < size+4 {
-		m.flush()
-		m.startTime = ts
-	}
-	m.stopTime = ts
-
-	util.Uint32toBytes(m.sizeBuf, uint32(size))
-	copy(m.buf[m.pos:m.pos+4], m.sizeBuf)
-
-	copy(m.buf[m.pos+4:m.pos+4+size], logEntryData)
-	m.pos += size + 4
-}
diff --git a/weed/queue/log_buffer.go b/weed/queue/log_buffer.go
new file mode 100644
index 000000000..d6ccdf2a6
--- /dev/null
+++ b/weed/queue/log_buffer.go
@@ -0,0 +1,92 @@
+package queue
+
+import (
+	"sync"
+	"time"
+
+	"github.com/golang/protobuf/proto"
+
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/chrislusf/seaweedfs/weed/util"
+)
+
+type LogBuffer struct {
+	buf           []byte
+	pos           int
+	startTime     time.Time
+	stopTime      time.Time
+	sizeBuf       []byte
+	flushInterval time.Duration
+	flushFn       func(startTime, stopTime time.Time, buf []byte)
+	isStopping    bool
+	sync.Mutex
+}
+
+func NewLogBuffer(flushInterval time.Duration, flushFn func(startTime, stopTime time.Time, buf []byte)) *LogBuffer {
+	lb := &LogBuffer{
+		buf:           make([]byte, 4*0124*1024),
+		sizeBuf:       make([]byte, 4),
+		flushInterval: flushInterval,
+		flushFn:       flushFn,
+	}
+	go lb.loopFlush()
+	return lb
+}
+
+func (m *LogBuffer) AddToBuffer(ts time.Time, key, data []byte) {
+
+	logEntry := &filer_pb.LogEntry{
+		TsNs:             ts.UnixNano(),
+		PartitionKeyHash: util.HashToInt32(key),
+		Data:             data,
+	}
+
+	logEntryData, _ := proto.Marshal(logEntry)
+
+	size := len(logEntryData)
+
+	m.Lock()
+	defer m.Unlock()
+
+	if m.pos == 0 {
+		m.startTime = ts
+	}
+
+	if m.startTime.Add(m.flushInterval).Before(ts) || len(m.buf)-m.pos < size+4 {
+		m.flush()
+		m.startTime = ts
+	}
+	m.stopTime = ts
+
+	util.Uint32toBytes(m.sizeBuf, uint32(size))
+	copy(m.buf[m.pos:m.pos+4], m.sizeBuf)
+
+	copy(m.buf[m.pos+4:m.pos+4+size], logEntryData)
+	m.pos += size + 4
+}
+
+func (m *LogBuffer) Shutdown() {
+	if m.isStopping {
+		return
+	}
+	m.isStopping = true
+	m.Lock()
+	m.flush()
+	m.Unlock()
+}
+
+func (m *LogBuffer) loopFlush() {
+	for !m.isStopping {
+		m.Lock()
+		m.flush()
+		m.Unlock()
+		time.Sleep(m.flushInterval)
+	}
+}
+
+func (m *LogBuffer) flush() {
+	if m.flushFn != nil && m.pos > 0 {
+		m.flushFn(m.startTime, m.stopTime, m.buf[:m.pos])
+		m.pos = 0
+	}
+}