diff --git a/bench/http.go b/bench/http.go
index f9a03c7..8a6a470 100644
--- a/bench/http.go
+++ b/bench/http.go
@@ -21,9 +21,9 @@ import (
 	"github.com/yedf/dtm/examples"
 )
 
-// 启动命令：go run app/main.go qs
+// launch command：go run app/main.go qs
 
-// 事务参与者的服务地址
+// service address of the transcation
 const benchAPI = "/api/busi_bench"
 const benchPort = 8083
 const total = 200000
diff --git a/common/config.go b/common/config.go
index 5be36d3..4a7f180 100644
--- a/common/config.go
+++ b/common/config.go
@@ -12,6 +12,9 @@ import (
 
 const (
 	DtmMetricsPort = 8889
+	Mysql = "mysql"
+	Redis = "redis"
+	BoltDb = "boltdb"
 )
 
 // MicroService config type for micro service
@@ -92,12 +95,23 @@ func MustLoadConfig() {
 func checkConfig() error {
 	if Config.RetryInterval < 10 {
 		return errors.New("RetryInterval should not be less than 10")
-	} else if Config.TimeoutToFail < Config.RetryInterval {
+	}
+	if Config.TimeoutToFail < Config.RetryInterval {
 		return errors.New("TimeoutToFail should not be less than RetryInterval")
-	} else if Config.Store.Driver == "boltdb" {
+	}
+	if Config.Store.Driver == BoltDb {
 		return nil
-	} else if Config.Store.Driver != "redis" && (Config.Store.User == "" || Config.Store.Host == "" || Config.Store.Port == 0) {
-		return errors.New("db config not valid")
+	}
+	if Config.Store.Driver == Mysql {
+		if Config.Store.Host == "" {
+			return errors.New("Db host not valid ")
+		}
+		if Config.Store.Port == 0 {
+			return errors.New("Db port not valid ")
+		}
+		if Config.Store.User == "" {
+			return errors.New("Db user not valid ")
+		}
 	}
 	return nil
 }
diff --git a/common/config_test.go b/common/config_test.go
index dc2a660..926eb2f 100644
--- a/common/config_test.go
+++ b/common/config_test.go
@@ -1,6 +1,7 @@
 package common
 
 import (
+	"errors"
 	"os"
 	"testing"
 
@@ -15,3 +16,34 @@ func TestLoadFromEnv(t *testing.T) {
 	loadFromEnv("T", &ms)
 	assert.Equal(t, "d1", ms.Driver)
 }
+
+func TestCheckConfig(t *testing.T) {
+	config := &Config
+	retryIntervalErr := checkConfig()
+	retryIntervalExpect := errors.New("RetryInterval should not be less than 10")
+	assert.Equal(t,retryIntervalErr,retryIntervalExpect)
+
+	config.RetryInterval = 10
+	timeoutToFailErr := checkConfig()
+	timeoutToFailExpect := errors.New("TimeoutToFail should not be less than RetryInterval")
+	assert.Equal(t,timeoutToFailErr,timeoutToFailExpect)
+
+	config.TimeoutToFail = 20
+	driverErr := checkConfig()
+	assert.Equal(t,driverErr,nil)
+
+	config.Store = Store{Driver: Mysql}
+	hostErr := checkConfig()
+	hostExpect := errors.New("Db host not valid ")
+	assert.Equal(t,hostErr,hostExpect)
+
+	config.Store = Store{Driver: Mysql,Host: "127.0.0.1"}
+	portErr := checkConfig()
+	portExpect := errors.New("Db port not valid ")
+	assert.Equal(t,portErr,portExpect)
+
+	config.Store = Store{Driver: Mysql,Host: "127.0.0.1",Port: 8686}
+	userErr := checkConfig()
+	userExpect := errors.New("Db user not valid ")
+	assert.Equal(t,userErr,userExpect)
+}
diff --git a/dtmcli/dtmimp/db_special.go b/dtmcli/dtmimp/db_special.go
index d45f460..b4db7fc 100644
--- a/dtmcli/dtmimp/db_special.go
+++ b/dtmcli/dtmimp/db_special.go
@@ -41,10 +41,6 @@ func init() {
 
 type postgresDBSpecial struct{}
 
-func (*postgresDBSpecial) TimestampAdd(second int) string {
-	return fmt.Sprintf("current_timestamp + interval '%d second'", second)
-}
-
 func (*postgresDBSpecial) GetXaSQL(command string, xid string) string {
 	return map[string]string{
 		"end":      "",
diff --git a/dtmcli/dtmimp/utils.go b/dtmcli/dtmimp/utils.go
index c484884..c6fa7ad 100644
--- a/dtmcli/dtmimp/utils.go
+++ b/dtmcli/dtmimp/utils.go
@@ -133,7 +133,7 @@ func InitLog() {
 		config.Encoding = "console"
 		config.EncoderConfig.EncodeLevel = zapcore.CapitalColorLevelEncoder
 	}
-	p, err := config.Build()
+	p, err := config.Build(zap.AddCallerSkip(1))
 	if err != nil {
 		log.Fatal("create logger failed: ", err)
 	}
diff --git a/dtmsvr/storage/boltdb.go b/dtmsvr/storage/boltdb.go
index e1e6cc0..ee3f3f0 100644
--- a/dtmsvr/storage/boltdb.go
+++ b/dtmsvr/storage/boltdb.go
@@ -21,6 +21,20 @@ func boltGet() *bolt.DB {
 	boltOnce.Do(func() {
 		db, err := bolt.Open("./dtm.bolt", 0666, &bolt.Options{Timeout: 1 * time.Second})
 		dtmimp.E2P(err)
+
+		// NOTE: we must ensure all buckets is exists before we use it
+		err = db.Update(func(t *bolt.Tx) error {
+			for _, bucket := range allBuckets {
+				_, err := t.CreateBucketIfNotExists(bucket)
+				if err != nil {
+					return err
+				}
+			}
+
+			return nil
+		})
+		dtmimp.E2P(err)
+
 		boltDb = db
 	})
 	return boltDb
@@ -29,6 +43,11 @@ func boltGet() *bolt.DB {
 var bucketGlobal = []byte("global")
 var bucketBranches = []byte("branches")
 var bucketIndex = []byte("index")
+var allBuckets = [][]byte{
+	bucketGlobal,
+	bucketBranches,
+	bucketIndex,
+}
 
 func tGetGlobal(t *bolt.Tx, gid string) *TransGlobalStore {
 	trans := TransGlobalStore{}
diff --git a/go.mod b/go.mod
index 342daae..0c07635 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,6 @@ module github.com/yedf/dtm
 go 1.15
 
 require (
-	github.com/bwmarrin/snowflake v0.3.0
 	github.com/gin-gonic/gin v1.6.3
 	github.com/go-playground/assert/v2 v2.0.1
 	github.com/go-redis/redis/v8 v8.11.4
diff --git a/go.sum b/go.sum
index 665a229..6d8821e 100644
--- a/go.sum
+++ b/go.sum
@@ -43,6 +43,7 @@ github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWX
 github.com/Shopify/sarama v1.30.0/go.mod h1:zujlQQx1kzHsh4jfV1USnptCQrHAEZ2Hk8fTKCulPVs=
 github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
 github.com/Shopify/toxiproxy/v2 v2.1.6-0.20210914104332-15ea381dcdae/go.mod h1:/cvHQkZ1fst0EmZnA5dFtiQdWCNCFYzb+uE2vqVgvx0=
+github.com/agiledragon/gomonkey v0.0.0-20190517145658-8fa491f7b918 h1:a88Ln+jbIokfi6xoKtq10dbgp4VMg1CmHF1J42p8EyE=
 github.com/agiledragon/gomonkey v0.0.0-20190517145658-8fa491f7b918/go.mod h1:2NGfXu1a80LLr2cmWXGBDaHEjb1idR6+FVlX5T3D9hw=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
@@ -61,9 +62,7 @@ github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+Ce
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/bkaradzic/go-lz4 v1.0.0/go.mod h1:0YdlkowM3VswSROI7qDxhRvJ3sLhlFrRRwjwegp5jy4=
-github.com/bwmarrin/snowflake v0.3.0/go.mod h1:NdZxfVWX+oR6y2K0o6qAYv6gIOP9rjG0/E9WsDpxqwE=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/cespare/xxhash/v2 v2.1.2 h1:YRXhKfTDauu4ajMg1TPgFO5jnlC2HCbmLXMcTG5cbYE=
 github.com/cespare/xxhash/v2 v2.1.2/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
@@ -169,6 +168,7 @@ github.com/golang-jwt/jwt v3.2.1+incompatible/go.mod h1:8pz2t5EyA70fFQQSrl6XZXzq
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/golang/groupcache v0.0.0-20191227052852-215e87163ea7/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
+github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e h1:1r7pUrabqp18hOBcwBwiTsbnFeTZHV9eER/QT5JVZxY=
 github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/golang/mock v1.2.0/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
 github.com/golang/mock v1.3.1/go.mod h1:sBzyDLLjw3U8JLTeZvSv8jJB+tU5PVekmnlKIyFUx0Y=
@@ -231,6 +231,7 @@ github.com/googleapis/gax-go/v2 v2.0.4/go.mod h1:0Wqv26UfaUD9n4G6kQubkQ+KchISgw+
 github.com/googleapis/gax-go/v2 v2.0.5/go.mod h1:DWXyrwAJ9X0FpwwEdw+IPEYBICEFu5mhpdKc/us6bOk=
 github.com/googleapis/gnostic v0.4.1 h1:DLJCy1n/vrD4HPjOvYcT8aYQXpPIzoRZONaYwyycI+I=
 github.com/googleapis/gnostic v0.4.1/go.mod h1:LRhVm6pbyptWbWbuZ38d1eyptfvIytN3ir6b65WBswg=
+github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1 h1:EGx4pi6eqNxGaHF6qqu48+N2wcFQ5qg5FXgOdqsJ5d8=
 github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
 github.com/gorilla/context v1.1.1/go.mod h1:kBGZzfjB9CEq2AlWe17Uuf7NDRt0dE0s8S51q0aT7Yg=
 github.com/gorilla/mux v1.6.2/go.mod h1:1lud6UwP+6orDFRuTfBEV8e9/aOM/c4fVVCaMa2zaAs=
@@ -322,6 +323,7 @@ github.com/json-iterator/go v1.1.11 h1:uVUAXhF2To8cbw/3xN3pxj6kk7TYKs98NIrTqPlMW
 github.com/json-iterator/go v1.1.11/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/jstemmer/go-junit-report v0.0.0-20190106144839-af01ea7f8024/go.mod h1:6v2b51hI/fHJwM22ozAgKL4VKDeJcHhJFhtBdhmNjmU=
 github.com/jstemmer/go-junit-report v0.9.1/go.mod h1:Brl9GWCQeLvo8nXZwPNNblvFj/XSXhF0NWZEnDohbsk=
+github.com/jtolds/gls v4.20.0+incompatible h1:xdiiI2gbIgH/gLH7ADydsJ1uDOEzR8yvV7C0MuV77Wo=
 github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
 github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
 github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8IZAc4RVcycCCAKdM=
@@ -459,12 +461,15 @@ github.com/sirupsen/logrus v1.4.1/go.mod h1:ni0Sbl8bgC9z8RoU9G6nDWqqs/fq4eDPysMB
 github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
 github.com/sirupsen/logrus v1.6.0/go.mod h1:7uNnSEd1DgxDLC74fIahvMZmmYsHGZGEOFrfsX/uA88=
 github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
+github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d h1:zE9ykElWQ6/NYmHa3jpm/yHnI4xSofP+UP6SpjHcSeM=
 github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
+github.com/smartystreets/goconvey v0.0.0-20190731233626-505e41936337 h1:WN9BUFbdyOsSH/XohnWpXOlq9NBD5sGAB2FciQMUEe8=
 github.com/smartystreets/goconvey v0.0.0-20190731233626-505e41936337/go.mod h1:syvi0/a8iFYH4r/RixwvyeAJjdLS9QV7WQ/tjFTllLA=
 github.com/spaolacci/murmur3 v1.1.0 h1:7c1g84S4BPRrfL5Xrdp6fOJ206sU9y293DDHaoy0bLI=
 github.com/spaolacci/murmur3 v1.1.0/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
 github.com/spf13/afero v1.2.2/go.mod h1:9ZxEEn6pIJ8Rxe320qSDBk6AsU0r9pR7Q4OcevTdifk=
 github.com/spf13/pflag v0.0.0-20170130214245-9ff6c6923cff/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
+github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/streadway/amqp v0.0.0-20190404075320-75d898a42a94/go.mod h1:AZpEONHx3DKn8O/DFsRAY58/XVQiIPMTMB1SddzLXVw=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
@@ -519,6 +524,7 @@ go.opentelemetry.io/otel v1.1.0 h1:8p0uMLcyyIx0KHNTgO8o3CW8A1aA+dJZJW6PvnMz0Wc=
 go.opentelemetry.io/otel v1.1.0/go.mod h1:7cww0OW51jQ8IaZChIEdqLwgh+44+7uiTdWsAL0wQpA=
 go.opentelemetry.io/otel/exporters/jaeger v1.1.0/go.mod h1:D/GIBwAdrFTTqCy1iITpC9nh5rgJpIbFVgkhlz2vCXk=
 go.opentelemetry.io/otel/exporters/zipkin v1.1.0/go.mod h1:LZwDnf1mVGTPMq9hdRUHfFBH30SuQvZ1BJaVywpg0VI=
+go.opentelemetry.io/otel/sdk v1.1.0 h1:j/1PngUJIDOddkCILQYTevrTIbWd494djgGkSsMit+U=
 go.opentelemetry.io/otel/sdk v1.1.0/go.mod h1:3aQvM6uLm6C4wJpHtT8Od3vNzeZ34Pqc6bps8MywWzo=
 go.opentelemetry.io/otel/trace v1.1.0 h1:N25T9qCL0+7IpOT8RrRy0WYlL7y6U0WiUJzXcVdXY/o=
 go.opentelemetry.io/otel/trace v1.1.0/go.mod h1:i47XtdcBQiktu5IsrPqOHe8w+sBmnLwwHt8wiUsWGTI=
@@ -781,6 +787,7 @@ google.golang.org/api v0.20.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
+google.golang.org/appengine v1.6.5 h1:tycE03LOZYQNhDpS27tcQdAzLCVMaj7QT2SXxebnpCM=
 google.golang.org/appengine v1.6.5/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
 google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
@@ -833,6 +840,7 @@ gopkg.in/h2non/gock.v1 v1.1.2/go.mod h1:n7UGz/ckNChHiK05rDoiC4MYSunEC/lyaUm2WWaD
 gopkg.in/inconshreveable/log15.v2 v2.0.0-20180818164646-67afb5ed74ec/go.mod h1:aPpfJ7XW+gOuirDoZ8gHhLh3kZ1B08FtV2bbmy7Jv3s=
 gopkg.in/inf.v0 v0.9.1 h1:73M5CoZyi3ZLMOyDlQh031Cx6N9NDJ2Vvfl76EDAgDc=
 gopkg.in/inf.v0 v0.9.1/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw=
+gopkg.in/natefinch/lumberjack.v2 v2.0.0 h1:1Lc07Kr7qY4U2YPouBjpCLxpiyxIVoxqXgkXLknAOE8=
 gopkg.in/natefinch/lumberjack.v2 v2.0.0/go.mod h1:l0ndWWf7gzL7RNwBG7wST/UCcT4T24xpD6X8LsfU/+k=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=