diff --git a/ChangeLog b/ChangeLog
index f6648d0..c2d4540 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,6 @@
+2019-04-13 Alibaba Cloud.
+	* version: 1.2.3
+	* IMPROVE: polish log print to print more error info.
 2019-04-03 Alibaba Cloud.
 	* version: 1.2.2
 	* BUGFIX: support 5.0 rdb RDB_OPCODE_MODULE_AUX, RDB_OPCODE_IDLE and
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..403f955
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,6 @@
+FROM busybox
+
+COPY ./bin/redis-shake /usr/local/app/redis-shake
+COPY ./conf/redis-shake.conf /usr/local/app/redis-shake.conf
+ENV TYPE sync
+CMD /usr/local/app/redis-shake -type=${TYPE} -conf=/usr/local/app/redis-shake.conf
diff --git a/bin/redis-shake.darwin64 b/bin/redis-shake.darwin64
index bc0b97e..e3736e8 100755
Binary files a/bin/redis-shake.darwin64 and b/bin/redis-shake.darwin64 differ
diff --git a/bin/redis-shake.linux64 b/bin/redis-shake.linux64
index 0757bd4..249750e 100755
Binary files a/bin/redis-shake.linux64 and b/bin/redis-shake.linux64 differ
diff --git a/conf/redis-shake.conf b/conf/redis-shake.conf
index 5d51c18..66f2b35 100644
--- a/conf/redis-shake.conf
+++ b/conf/redis-shake.conf
@@ -4,8 +4,9 @@
 id = redis-shake
 # log file，日志文件，不配置将打印到stdout (e.g. /var/log/redis-shake.log )
 log_file =
-# pid path，进程文件存储地址，不配置将输出到项目目录下 （e.g. /var/run/ )
-pid_path =
+# pid path，进程文件存储地址（e.g. /var/run/)，不配置将默认输出到执行下面,
+# 注意这个是目录，真正的pid是`{pid_path}/{id}.pid`
+pid_path = 
 
 # pprof port
 system_profile = 9310
@@ -15,8 +16,8 @@ http_profile = 9320
 # runtime.GOMAXPROCS, 0 means use cpu core number: runtime.NumCPU()
 ncpu = 0
 
-# parallel routines number used in RDB file syncing.
-parallel = 4
+# parallel routines number used in RDB file syncing. default is 64.
+parallel = 32
 
 # input RDB file. read from stdin, default is stdin ('/dev/stdin').
 # used in `decode` and `restore`.
diff --git a/src/redis-shake/common/common.go b/src/redis-shake/common/common.go
index 6bfd69f..b0907cd 100644
--- a/src/redis-shake/common/common.go
+++ b/src/redis-shake/common/common.go
@@ -1,19 +1,49 @@
 package utils
 
-import(
-	logRotate "gopkg.in/natefinch/lumberjack.v2"
+import (
+	"net"
+	"fmt"
+	"strings"
+
 	"pkg/libs/bytesize"
+
+	logRotate "gopkg.in/natefinch/lumberjack.v2"
 )
 
-const(
+const (
 	GolangSecurityTime = "2006-01-02T15:04:05Z"
 	// GolangSecurityTime = "2006-01-02 15:04:05"
 	ReaderBufferSize = bytesize.MB * 32
 	WriterBufferSize = bytesize.MB * 8
 )
 
-var(
+var (
 	Version = "$"
 	LogRotater *logRotate.Logger
 	StartTime string
-)
\ No newline at end of file
+)
+
+// read until hit the end of RESP: "\r\n"
+func ReadRESPEnd(c net.Conn) (string, error) {
+	var ret string
+	for {
+		b := make([]byte, 1)
+		if _, err := c.Read(b); err != nil {
+			return "", fmt.Errorf("read error[%v], current return[%s]", err, ret)
+		}
+
+		ret += string(b)
+		if strings.HasSuffix(ret, "\r\n") {
+			break
+		}
+	}
+	return ret, nil
+}
+
+func RemoveRESPEnd(input string) string {
+	length := len(input)
+	if length >= 2 {
+		return input[: length - 2]
+	}
+	return input
+}
\ No newline at end of file
diff --git a/src/redis-shake/common/mix.go b/src/redis-shake/common/mix.go
index 1ad3de8..1f5c0e0 100644
--- a/src/redis-shake/common/mix.go
+++ b/src/redis-shake/common/mix.go
@@ -24,11 +24,22 @@ func WritePid(id string) (err error) {
 
 func WritePidById(id string, path string) error {
 	var dir string
+	var err error
 	if path == "" {
-		dir, _ = os.Getwd()
+		if dir, err = os.Getwd(); err != nil {
+			return err
+		}
 	} else {
 		dir = path
+		if _, err := os.Stat(dir); os.IsNotExist(err) {
+			os.Mkdir(dir, os.ModePerm)
+		}
 	}
+
+	if dir, err = filepath.Abs(dir); err != nil {
+		return err
+	}
+
 	pidfile := filepath.Join(dir, id) + ".pid"
 	if err := WritePid(pidfile); err != nil {
 		return err
diff --git a/src/redis-shake/common/utils.go b/src/redis-shake/common/utils.go
index e4b30df..3f38631 100644
--- a/src/redis-shake/common/utils.go
+++ b/src/redis-shake/common/utils.go
@@ -21,8 +21,8 @@ import (
 	"pkg/libs/stats"
 	"pkg/rdb"
 	"pkg/redis"
-	redigo "github.com/garyburd/redigo/redis"
 	"redis-shake/configure"
+	redigo "github.com/garyburd/redigo/redis"
 )
 
 func OpenRedisConn(target, auth_type, passwd string) redigo.Conn {
@@ -42,6 +42,7 @@ func OpenNetConn(target, auth_type, passwd string) net.Conn {
 		log.PanicErrorf(err, "cannot connect to '%s'", target)
 	}
 
+	log.Infof("try to auth address[%v] with type[%v]", target, auth_type)
 	AuthPassword(c, auth_type, passwd)
 	return c
 }
@@ -84,22 +85,23 @@ func OpenReadWriteFile(name string) *os.File {
 }
 
 func SendPSyncListeningPort(c net.Conn, port int) {
-
 	_, err := c.Write(redis.MustEncodeToBytes(redis.NewCommand("replconf", "listening-port", port)))
 	if err != nil {
 		log.PanicError(errors.Trace(err), "write replconf listening-port failed")
 	}
-	var b = make([]byte, 5)
-	if _, err := io.ReadFull(c, b); err != nil {
+
+	ret, err := ReadRESPEnd(c)
+	if err != nil {
 		log.PanicError(errors.Trace(err), "read auth response failed")
 	}
-	if strings.ToUpper(string(b)) != "+OK\r\n" {
-		log.Panic("repl listening-port failed: ", string(b))
+	if strings.ToUpper(ret) != "+OK\r\n" {
+		log.Panicf("repl listening-port failed[%v]", RemoveRESPEnd(ret))
 	}
 }
 
 func AuthPassword(c net.Conn, auth_type, passwd string) {
 	if passwd == "" {
+		log.Infof("input password is empty, skip auth address[%v] with type[%v].", c.RemoteAddr(), auth_type)
 		return
 	}
 
@@ -107,12 +109,13 @@ func AuthPassword(c net.Conn, auth_type, passwd string) {
 	if err != nil {
 		log.PanicError(errors.Trace(err), "write auth command failed")
 	}
-	var b = make([]byte, 5)
-	if _, err := io.ReadFull(c, b); err != nil {
+
+	ret, err := ReadRESPEnd(c)
+	if err != nil {
 		log.PanicError(errors.Trace(err), "read auth response failed")
 	}
-	if strings.ToUpper(string(b)) != "+OK\r\n" {
-		log.Panicf("auth failed[%s]", string(b))
+	if strings.ToUpper(ret) != "+OK\r\n" {
+		log.Panicf("auth failed[%v]", RemoveRESPEnd(ret))
 	}
 }
 
@@ -126,6 +129,7 @@ func OpenSyncConn(target string, auth_type, passwd string) (net.Conn, <-chan int
 
 func waitRdbDump(r io.Reader) <-chan int64 {
 	size := make(chan int64)
+	// read rdb size
 	go func() {
 		var rsp string
 		for {
diff --git a/src/redis-shake/main/main.go b/src/redis-shake/main/main.go
index f725153..d22dc11 100644
--- a/src/redis-shake/main/main.go
+++ b/src/redis-shake/main/main.go
@@ -178,7 +178,7 @@ func sanitizeOptions(tp string) error {
 	}
 
 	if conf.Options.Parallel == 0 { // not set
-		conf.Options.Parallel = 1
+		conf.Options.Parallel = 64 // default is 64
 	} else if conf.Options.Parallel > 1024 {
 		return fmt.Errorf("parallel[%v] should in (0, 1024]", conf.Options.Parallel)
 	} else {
diff --git a/src/redis-shake/sync.go b/src/redis-shake/sync.go
index 6521d90..26a597e 100644
--- a/src/redis-shake/sync.go
+++ b/src/redis-shake/sync.go
@@ -100,10 +100,8 @@ func (cmd *CmdSync) Main() {
 		log.Panic("invalid argument: target")
 	}
 
-	log.Infof("sync from '%s' to '%s' http '%d'\n", from, target, conf.Options.HttpProfile)
-
+	log.Infof("sync from '%s' to '%s' with http-port[%d]\n", from, target, conf.Options.HttpProfile)
 	cmd.wait_full = make(chan struct{})
-	log.Infof("sync from '%s' to '%s'\n", from, target)
 
 	var sockfile *os.File
 	if len(conf.Options.SockFileName) != 0 {
@@ -121,7 +119,7 @@ func (cmd *CmdSync) Main() {
 	}
 	defer input.Close()
 
-	log.Infof("rdb file = %d\n", nsize)
+	log.Infof("rdb file size = %d\n", nsize)
 
 	if sockfile != nil {
 		r, w := pipe.NewFilePipe(int(conf.Options.SockFileSize), sockfile)
@@ -136,6 +134,7 @@ func (cmd *CmdSync) Main() {
 		input = r
 	}
 
+	// start heartbeat
 	if len(conf.Options.HeartbeatUrl) > 0 {
 		heartbeatCtl := heartbeat.HeartbeatController{
 			ServerUrl: conf.Options.HeartbeatUrl,
@@ -146,9 +145,11 @@ func (cmd *CmdSync) Main() {
 
 	reader := bufio.NewReaderSize(input, utils.ReaderBufferSize)
 
+	// sync rdb
 	base.Status = "full"
 	cmd.SyncRDBFile(reader, target, conf.Options.TargetAuthType, conf.Options.TargetPasswordRaw, nsize)
 
+	// sync increment
 	base.Status = "incr"
 	close(cmd.wait_full)
 	cmd.SyncCommand(reader, target, conf.Options.TargetAuthType, conf.Options.TargetPasswordRaw)
@@ -172,14 +173,20 @@ func (cmd *CmdSync) SendSyncCmd(master, auth_type, passwd string) (net.Conn, int
 
 func (cmd *CmdSync) SendPSyncCmd(master, auth_type, passwd string) (pipe.Reader, int64) {
 	c := utils.OpenNetConn(master, auth_type, passwd)
+	log.Infof("psync connect '%v' with auth type[%v] OK!", master, auth_type)
+
 	utils.SendPSyncListeningPort(c, conf.Options.HttpProfile)
+	log.Infof("psync send listening port[%v] OK!", conf.Options.HttpProfile)
+
 	br := bufio.NewReaderSize(c, utils.ReaderBufferSize)
 	bw := bufio.NewWriterSize(c, utils.WriterBufferSize)
 
+	log.Infof("try to send 'psync' command")
 	runid, offset, wait := utils.SendPSyncFullsync(br, bw)
 	cmd.targetOffset.Set(offset)
 	log.Infof("psync runid = %s offset = %d, fullsync", runid, offset)
 
+	// get rdb file size
 	var nsize int64
 	for nsize == 0 {
 		select {