diff --git a/weed/command/filer_sync.go b/weed/command/filer_sync.go
index a1d0bd2ac..cafd51a16 100644
--- a/weed/command/filer_sync.go
+++ b/weed/command/filer_sync.go
@@ -36,7 +36,7 @@ type SyncOptions struct {
 }
 
 var (
-	syncOptions SyncOptions
+	syncOptions    SyncOptions
 	syncCpuProfile *string
 	syncMemProfile *string
 )
diff --git a/weed/filer/meta_aggregator.go b/weed/filer/meta_aggregator.go
index c1e73aaf9..e95b457a4 100644
--- a/weed/filer/meta_aggregator.go
+++ b/weed/filer/meta_aggregator.go
@@ -87,7 +87,7 @@ func (ma *MetaAggregator) subscribeToOneFiler(f *Filer, self string, peer string
 				if err := ma.updateOffset(f, peer, peerSignature, event.TsNs); err == nil {
 					if event.TsNs < time.Now().Add(-2*time.Minute).UnixNano() {
 						glog.V(0).Infof("sync with %s progressed to: %v %0.2f/sec", peer, time.Unix(0, event.TsNs), float64(counter)/60.0)
-					} else if !synced{
+					} else if !synced {
 						synced = true
 						glog.V(0).Infof("synced with %s", peer)
 					}
@@ -162,13 +162,13 @@ func (ma *MetaAggregator) readFilerStoreSignature(peer string) (sig int32, err e
 	return
 }
 
-const(
+const (
 	MetaOffsetPrefix = "Meta"
 )
 
 func (ma *MetaAggregator) readOffset(f *Filer, peer string, peerSignature int32) (lastTsNs int64, err error) {
 
-	key := []byte(MetaOffsetPrefix+"xxxx")
+	key := []byte(MetaOffsetPrefix + "xxxx")
 	util.Uint32toBytes(key[len(MetaOffsetPrefix):], uint32(peerSignature))
 
 	value, err := f.Store.KvGet(context.Background(), key)
@@ -191,7 +191,7 @@ func (ma *MetaAggregator) readOffset(f *Filer, peer string, peerSignature int32)
 
 func (ma *MetaAggregator) updateOffset(f *Filer, peer string, peerSignature int32, lastTsNs int64) (err error) {
 
-	key := []byte(MetaOffsetPrefix+"xxxx")
+	key := []byte(MetaOffsetPrefix + "xxxx")
 	util.Uint32toBytes(key[len(MetaOffsetPrefix):], uint32(peerSignature))
 
 	value := make([]byte, 8)
diff --git a/weed/replication/replicator.go b/weed/replication/replicator.go
index e0535175e..c4228434f 100644
--- a/weed/replication/replicator.go
+++ b/weed/replication/replicator.go
@@ -84,4 +84,3 @@ func ReadFilerSignature(grpcDialOption grpc.DialOption, filer string) (filerSign
 	}
 	return filerSignature, nil
 }
-
diff --git a/weed/shell/command_volume_balance.go b/weed/shell/command_volume_balance.go
index c92d61e35..624821431 100644
--- a/weed/shell/command_volume_balance.go
+++ b/weed/shell/command_volume_balance.go
@@ -174,7 +174,7 @@ func (n *Node) localVolumeRatio() float64 {
 }
 
 func (n *Node) localVolumeNextRatio() float64 {
-	return divide(len(n.selectedVolumes) + 1, int(n.info.MaxVolumeCount))
+	return divide(len(n.selectedVolumes)+1, int(n.info.MaxVolumeCount))
 }
 
 func (n *Node) selectVolumes(fn func(v *master_pb.VolumeInformationMessage) bool) {
diff --git a/weed/shell/command_volume_balance_test.go b/weed/shell/command_volume_balance_test.go
index 4f46648c0..9e154dc00 100644
--- a/weed/shell/command_volume_balance_test.go
+++ b/weed/shell/command_volume_balance_test.go
@@ -20,7 +20,6 @@ func TestIsGoodMove(t *testing.T) {
 
 	var tests = []testMoveCase{
 
-
 		{
 			name:        "test 100 move to spread into proper data centers",
 			replication: "100",
@@ -132,7 +131,6 @@ func TestIsGoodMove(t *testing.T) {
 			targetLocation: location{"dc1", "r2", &master_pb.DataNodeInfo{Id: "dn3"}},
 			expected:       true,
 		},
-
 	}
 
 	for _, tt := range tests {
diff --git a/weed/storage/needle_map_memory.go b/weed/storage/needle_map_memory.go
index 3fa85deda..23ee561d0 100644
--- a/weed/storage/needle_map_memory.go
+++ b/weed/storage/needle_map_memory.go
@@ -65,7 +65,7 @@ func (nm *NeedleMap) Get(key NeedleId) (existingValue *needle_map.NeedleValue, o
 }
 func (nm *NeedleMap) Delete(key NeedleId) error {
 	existingValue, ok := nm.m.Get(NeedleId(key))
-	if !ok || existingValue.Size.IsDeleted(){
+	if !ok || existingValue.Size.IsDeleted() {
 		return nil
 	}
 	deletedBytes := nm.m.Delete(NeedleId(key))
diff --git a/weed/storage/needle_map_metric_test.go b/weed/storage/needle_map_metric_test.go
index 0c792869f..a460b3408 100644
--- a/weed/storage/needle_map_metric_test.go
+++ b/weed/storage/needle_map_metric_test.go
@@ -17,7 +17,7 @@ func TestFastLoadingNeedleMapMetrics(t *testing.T) {
 	for i := 0; i < 10000; i++ {
 		nm.Put(Uint64ToNeedleId(uint64(i+1)), Uint32ToOffset(uint32(0)), Size(1))
 		if rand.Float32() < 0.2 {
-			nm.Delete(Uint64ToNeedleId(uint64(rand.Int63n(int64(i))+1)))
+			nm.Delete(Uint64ToNeedleId(uint64(rand.Int63n(int64(i)) + 1)))
 		}
 	}
 
diff --git a/weed/util/compression.go b/weed/util/compression.go
index 736f76a5e..cf3ac7c57 100644
--- a/weed/util/compression.go
+++ b/weed/util/compression.go
@@ -12,11 +12,11 @@ import (
 	"github.com/klauspost/compress/zstd"
 )
 
-var(
+var (
 	UnsupportedCompression = fmt.Errorf("unsupported compression")
 )
 
-func MaybeGzipData(input []byte) ([]byte) {
+func MaybeGzipData(input []byte) []byte {
 	if IsGzippedContent(input) {
 		return input
 	}
@@ -24,13 +24,13 @@ func MaybeGzipData(input []byte) ([]byte) {
 	if err != nil {
 		return input
 	}
-	if len(gzipped) * 10 > len(input) * 9 {
+	if len(gzipped)*10 > len(input)*9 {
 		return input
 	}
 	return gzipped
 }
 
-func MaybeDecompressData(input []byte) ([]byte) {
+func MaybeDecompressData(input []byte) []byte {
 	uncompressed, err := DecompressData(input)
 	if err != nil {
 		if err != UnsupportedCompression {