diff --git a/README.md b/README.md
index 051d1935a..79f3ccf5e 100644
--- a/README.md
+++ b/README.md
@@ -363,7 +363,7 @@ GlusterFS hashes the path and filename into ids, and assigned to virtual volumes
 
 Ceph can be setup similar to SeaweedFS as a key->blob store. It is much more complicated, with the need to support layers on top of it. [Here is a more detailed comparison](https://github.com/chrislusf/seaweedfs/issues/120)
 
-SeaweedFS has a centralized master group to look up free volumes, while Ceph uses hashing and metadata servers to locate its objects. Having a centralized master makes it easy to code and manage. 
+SeaweedFS has a centralized master group to look up free volumes, while Ceph uses hashing and metadata servers to locate its objects. Having a centralized master makes it easy to code and manage.
 
 Same as SeaweedFS, Ceph is also based on the object store RADOS. Ceph is rather complicated with mixed reviews.
 
@@ -388,6 +388,12 @@ Other key features include: Erasure Encoding, JWT security.
 
 This is a super exciting project! And we need helpers and [support](https://www.patreon.com/seaweedfs)!
 
+BTW, We suggest run the code style check script `util/gostd` before you push your branch to remote, it will make SeaweedFS easy to review, maintain and develop:
+
+```
+$ ./util/gostd
+```
+
 [Back to TOC](#table-of-contents)
 
 ## Installation Guide ##
diff --git a/util/gostd b/util/gostd
new file mode 100755
index 000000000..e9fc783d1
--- /dev/null
+++ b/util/gostd
@@ -0,0 +1,98 @@
+#!/usr/bin/env bash
+
+############################  GLOBAL VARIABLES
+regex=' '
+branch="master"
+max_length=150
+
+REGEX_SUFFIX_GO=".+\.go$"
+
+############################  FUNCTIONS
+msg() {
+    printf '%b' "$1" >&2
+}
+
+die() {
+    msg "\33[31m[✘]\33[0m ${1}${2}"
+    exit 1
+}
+
+succ() {
+    msg "\33[34m[√]\33[0m ${1}${2}"
+}
+
+gostd() {
+    local branch=$1
+    local reg4exclude=$2
+    local max_length=$3
+
+    for file in `git diff $branch --name-only`
+    do
+        if ! [[ $file =~ $REGEX_SUFFIX_GO ]] || [[ $file =~ $reg4exclude ]]; then
+            continue
+        fi
+
+        error=`go fmt $file 2>&1`
+        if ! [ $? -eq 0 ]; then
+            die "go fmt $file:" "$error"
+        fi
+
+        succ "$file\n"
+
+        grep -n -E --color=always ".{$max_length}" $file | awk '{ printf ("%4s %s\n", "", $0) }'
+    done
+}
+
+get_options() {
+    while getopts "b:e:hl:" opts
+    do
+        case $opts in
+            b)
+                branch=$OPTARG
+                ;;
+            e)
+                regex=$OPTARG
+                ;;
+            h)
+                usage
+                exit 0
+                ;;
+            l)
+                max_length=$OPTARG
+                ;;
+            \?)
+                usage
+                exit 1
+                ;;
+        esac
+    done
+}
+
+usage () {
+    cat << _EOC_
+Usage:
+    gostd [options]
+
+Options:
+    -b <branch/commit>        Specify the git diff branch or commit.
+                              (default: master)
+    -e <regex>                Regex for excluding file or directory.
+    -h                        Print this usage.
+    -l <length>               Show files that exceed the limit line length.
+                              (default: 150)
+
+Examples:
+    gostd
+    gostd -b master -l 100
+    gostd -b 59d532a -e weed/pb -l 100
+_EOC_
+}
+
+main() {
+    get_options "$@"
+
+    gostd "$branch" "$regex" "$max_length"
+}
+
+############################  MAIN()
+main "$@"
diff --git a/weed/command/server.go b/weed/command/server.go
index 49d872bcb..228594ad0 100644
--- a/weed/command/server.go
+++ b/weed/command/server.go
@@ -1,10 +1,10 @@
 package command
 
 import (
+	"fmt"
 	"github.com/chrislusf/raft/protobuf"
 	"github.com/chrislusf/seaweedfs/weed/security"
 	"github.com/spf13/viper"
-	"fmt"
 	"net/http"
 	"os"
 	"runtime"
diff --git a/weed/server/master_grpc_server.go b/weed/server/master_grpc_server.go
index 730412b47..1cc3fef7a 100644
--- a/weed/server/master_grpc_server.go
+++ b/weed/server/master_grpc_server.go
@@ -79,10 +79,10 @@ func (ms *MasterServer) SendHeartbeat(stream master_pb.Seaweed_SendHeartbeatServ
 		}
 		if len(heartbeat.NewVolumes) > 0 || len(heartbeat.DeletedVolumes) > 0 {
 			// process delta volume ids if exists for fast volume id updates
-			for _, volInfo := range heartbeat.NewVolumes{
+			for _, volInfo := range heartbeat.NewVolumes {
 				message.NewVids = append(message.NewVids, volInfo.Id)
 			}
-			for _, volInfo := range heartbeat.DeletedVolumes{
+			for _, volInfo := range heartbeat.DeletedVolumes {
 				message.DeletedVids = append(message.DeletedVids, volInfo.Id)
 			}
 			// update master internal volume layouts
@@ -92,7 +92,7 @@ func (ms *MasterServer) SendHeartbeat(stream master_pb.Seaweed_SendHeartbeatServ
 			newVolumes, deletedVolumes := t.SyncDataNodeRegistration(heartbeat.Volumes, dn)
 
 			for _, v := range newVolumes {
-				glog.V(0).Infof("master see new volume %d from %s", uint32(v.Id),  dn.Url())
+				glog.V(0).Infof("master see new volume %d from %s", uint32(v.Id), dn.Url())
 				message.NewVids = append(message.NewVids, uint32(v.Id))
 			}
 			for _, v := range deletedVolumes {
diff --git a/weed/server/volume_grpc_client_to_master.go b/weed/server/volume_grpc_client_to_master.go
index 1c292db6a..b30b2d124 100644
--- a/weed/server/volume_grpc_client_to_master.go
+++ b/weed/server/volume_grpc_client_to_master.go
@@ -99,7 +99,7 @@ func (vs *VolumeServer) doHeartbeat(ctx context.Context, masterNode, masterGrpcA
 		select {
 		case volumeMessage := <-vs.store.NewVolumesChan:
 			deltaBeat := &master_pb.Heartbeat{
-				NewVolumes:[]*master_pb.VolumeShortInformationMessage{
+				NewVolumes: []*master_pb.VolumeShortInformationMessage{
 					&volumeMessage,
 				},
 			}
@@ -110,7 +110,7 @@ func (vs *VolumeServer) doHeartbeat(ctx context.Context, masterNode, masterGrpcA
 			}
 		case volumeMessage := <-vs.store.DeletedVolumesChan:
 			deltaBeat := &master_pb.Heartbeat{
-				DeletedVolumes:[]*master_pb.VolumeShortInformationMessage{
+				DeletedVolumes: []*master_pb.VolumeShortInformationMessage{
 					&volumeMessage,
 				},
 			}
diff --git a/weed/shell/command_volume_unmount.go b/weed/shell/command_volume_unmount.go
index 5fa4084dc..ce9f666af 100644
--- a/weed/shell/command_volume_unmount.go
+++ b/weed/shell/command_volume_unmount.go
@@ -50,7 +50,6 @@ func (c *commandVolumeUnmount) Do(args []string, commandEnv *commandEnv, writer
 
 }
 
-
 func unmountVolume(ctx context.Context, grpcDialOption grpc.DialOption, volumeId needle.VolumeId, sourceVolumeServer string) (err error) {
 	return operation.WithVolumeServerClient(sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 		_, unmountErr := volumeServerClient.VolumeUnmount(ctx, &volume_server_pb.VolumeUnmountRequest{
diff --git a/weed/storage/needle/needle.go b/weed/storage/needle/needle.go
index c224d2767..14265ec78 100644
--- a/weed/storage/needle/needle.go
+++ b/weed/storage/needle/needle.go
@@ -188,4 +188,3 @@ func ParseNeedleIdCookie(key_hash_string string) (NeedleId, Cookie, error) {
 func (n *Needle) LastModifiedString() string {
 	return time.Unix(int64(n.LastModified), 0).Format("2006-01-02T15:04:05")
 }
-
diff --git a/weed/storage/needle/needle_read_write.go b/weed/storage/needle/needle_read_write.go
index e1ad075b4..85f335892 100644
--- a/weed/storage/needle/needle_read_write.go
+++ b/weed/storage/needle/needle_read_write.go
@@ -185,7 +185,7 @@ func (n *Needle) ReadData(r *os.File, offset int64, size uint32, version Version
 	case Version2, Version3:
 		err = n.readNeedleDataVersion2(bytes[NeedleHeaderSize : NeedleHeaderSize+int(n.Size)])
 	}
-	if err != nil && err != io.EOF{
+	if err != nil && err != io.EOF {
 		return err
 	}
 	if size > 0 {
@@ -390,4 +390,3 @@ func (n *Needle) SetHasPairs() {
 func getActualSize(size uint32, version Version) int64 {
 	return NeedleHeaderSize + NeedleBodyLength(size, version)
 }
-
diff --git a/weed/storage/needle/volume_id_test.go b/weed/storage/needle/volume_id_test.go
index c1c426989..5ffcd90f6 100644
--- a/weed/storage/needle/volume_id_test.go
+++ b/weed/storage/needle/volume_id_test.go
@@ -3,11 +3,11 @@ package needle
 import "testing"
 
 func TestNewVolumeId(t *testing.T) {
-	if _,err := NewVolumeId("1"); err != nil {
+	if _, err := NewVolumeId("1"); err != nil {
 		t.Error(err)
 	}
 
-	if _, err := NewVolumeId("a");err != nil {
+	if _, err := NewVolumeId("a"); err != nil {
 		t.Logf("a is not legal volume id, %v", err)
 	}
 }
@@ -42,4 +42,4 @@ func TestVolumeId_Next(t *testing.T) {
 	if new := pvid.Next(); new != 12 {
 		t.Errorf("get next volume id failed")
 	}
-}
\ No newline at end of file
+}
diff --git a/weed/storage/volume_checking.go b/weed/storage/volume_checking.go
index 980656823..7bb998fa6 100644
--- a/weed/storage/volume_checking.go
+++ b/weed/storage/volume_checking.go
@@ -15,7 +15,7 @@ func CheckVolumeDataIntegrity(v *Volume, indexFile *os.File) (lastAppendAtNs uin
 		return 0, fmt.Errorf("verifyIndexFileIntegrity %s failed: %v", indexFile.Name(), e)
 	}
 	if indexSize == 0 {
-		return 0,nil
+		return 0, nil
 	}
 	var lastIdxEntry []byte
 	if lastIdxEntry, e = readIndexEntryAtOffset(indexFile, indexSize-NeedleMapEntrySize); e != nil {
@@ -23,7 +23,7 @@ func CheckVolumeDataIntegrity(v *Volume, indexFile *os.File) (lastAppendAtNs uin
 	}
 	key, offset, size := IdxFileEntry(lastIdxEntry)
 	if offset.IsZero() {
-		return 0,nil
+		return 0, nil
 	}
 	if size == TombstoneFileSize {
 		size = 0
diff --git a/weed/storage/volume_info.go b/weed/storage/volume_info.go
index 0e05019d2..2f6d1e8f9 100644
--- a/weed/storage/volume_info.go
+++ b/weed/storage/volume_info.go
@@ -45,9 +45,9 @@ func NewVolumeInfo(m *master_pb.VolumeInformationMessage) (vi VolumeInfo, err er
 
 func NewVolumeInfoFromShort(m *master_pb.VolumeShortInformationMessage) (vi VolumeInfo, err error) {
 	vi = VolumeInfo{
-		Id:               needle.VolumeId(m.Id),
-		Collection:       m.Collection,
-		Version:          needle.Version(m.Version),
+		Id:         needle.VolumeId(m.Id),
+		Collection: m.Collection,
+		Version:    needle.Version(m.Version),
 	}
 	rp, e := NewReplicaPlacementFromByte(byte(m.ReplicaPlacement))
 	if e != nil {
diff --git a/weed/topology/node.go b/weed/topology/node.go
index a115c8480..d1f539506 100644
--- a/weed/topology/node.go
+++ b/weed/topology/node.go
@@ -46,8 +46,8 @@ type NodeImpl struct {
 	maxVolumeCount    int64
 	parent            Node
 	sync.RWMutex      // lock children
-	children    map[NodeId]Node
-	maxVolumeId needle.VolumeId
+	children          map[NodeId]Node
+	maxVolumeId       needle.VolumeId
 
 	//for rack, data center, topology
 	nodeType string
diff --git a/weed/topology/topology_test.go b/weed/topology/topology_test.go
index 7d7d4d7ad..8f79ad684 100644
--- a/weed/topology/topology_test.go
+++ b/weed/topology/topology_test.go
@@ -114,10 +114,10 @@ func TestHandlingVolumeServerHeartbeat(t *testing.T) {
 			nil,
 			dn)
 
-		for vid, _ := range layout.vid2location{
+		for vid, _ := range layout.vid2location {
 			println("after add volume id", vid)
 		}
-		for _, vid := range layout.writables{
+		for _, vid := range layout.writables {
 			println("after add writable volume id", vid)
 		}
 
diff --git a/weed/util/compression.go b/weed/util/compression.go
index bb78f916c..c6c9423e2 100644
--- a/weed/util/compression.go
+++ b/weed/util/compression.go
@@ -91,4 +91,3 @@ func UnGzipData(input []byte) ([]byte, error) {
 
 	return false, false
 }
-