diff --git a/cmd/ledis-dump/main.go b/cmd/ledis-dump/main.go
index bf02ad7..b6a798d 100644
--- a/cmd/ledis-dump/main.go
+++ b/cmd/ledis-dump/main.go
@@ -23,7 +23,7 @@ func main() {
 	var err error
 	var f *os.File
 
-	if f, err = os.OpenFile(*dumpFile, os.O_CREATE|os.O_WRONLY, os.ModePerm); err != nil {
+	if f, err = os.OpenFile(*dumpFile, os.O_CREATE|os.O_WRONLY, 0644); err != nil {
 		println(err.Error())
 		return
 	}
diff --git a/cmd/ledis-server/main.go b/cmd/ledis-server/main.go
index c0e1204..448120c 100644
--- a/cmd/ledis-server/main.go
+++ b/cmd/ledis-server/main.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"flag"
+	"fmt"
 	"github.com/siddontang/ledisdb/config"
 	"github.com/siddontang/ledisdb/server"
 	"log"
@@ -15,6 +16,8 @@ import (
 
 var configFile = flag.String("config", "", "ledisdb config file")
 var dbName = flag.String("db_name", "", "select a db to use, it will overwrite the config's db name")
+var usePprof = flag.Bool("pprof", false, "enable pprof")
+var pprofPort = flag.Int("pprof_port", 6060, "pprof http port")
 
 func main() {
 	runtime.GOMAXPROCS(runtime.NumCPU())
@@ -60,9 +63,11 @@ func main() {
 		app.Close()
 	}()
 
-	go func() {
-		log.Println(http.ListenAndServe("localhost:6060", nil))
-	}()
+	if *usePprof {
+		go func() {
+			log.Println(http.ListenAndServe(fmt.Sprintf(":%d", *pprofPort), nil))
+		}()
+	}
 
 	app.Run()
 }
diff --git a/ledis/binlog.go b/ledis/binlog.go
index 077398a..0d9c251 100644
--- a/ledis/binlog.go
+++ b/ledis/binlog.go
@@ -117,7 +117,7 @@ func NewBinLog(cfg *config.Config) (*BinLog, error) {
 
 	l.path = path.Join(cfg.DataDir, "binlog")
 
-	if err := os.MkdirAll(l.path, os.ModePerm); err != nil {
+	if err := os.MkdirAll(l.path, 0755); err != nil {
 		return nil, err
 	}
 
@@ -136,7 +136,7 @@ func (l *BinLog) flushIndex() error {
 	data := strings.Join(l.logNames, "\n")
 
 	bakName := fmt.Sprintf("%s.bak", l.indexName)
-	f, err := os.OpenFile(bakName, os.O_WRONLY|os.O_CREATE, 0666)
+	f, err := os.OpenFile(bakName, os.O_WRONLY|os.O_CREATE, 0644)
 	if err != nil {
 		log.Error("create binlog bak index error %s", err.Error())
 		return err
@@ -217,7 +217,7 @@ func (l *BinLog) openNewLogFile() error {
 	lastName := l.getLogFile()
 
 	logPath := path.Join(l.path, lastName)
-	if l.logFile, err = os.OpenFile(logPath, os.O_CREATE|os.O_WRONLY, 0666); err != nil {
+	if l.logFile, err = os.OpenFile(logPath, os.O_CREATE|os.O_WRONLY, 0644); err != nil {
 		log.Error("open new logfile error %s", err.Error())
 		return err
 	}
diff --git a/ledis/ledis.go b/ledis/ledis.go
index f3c1c8c..30e6ac7 100644
--- a/ledis/ledis.go
+++ b/ledis/ledis.go
@@ -42,6 +42,7 @@ func Open(cfg *config.Config) (*Ledis, error) {
 	l.ldb = ldb
 
 	if cfg.BinLog.MaxFileNum > 0 && cfg.BinLog.MaxFileSize > 0 {
+		println("binlog will be refactored later, use your own risk!!!")
 		l.binlog, err = NewBinLog(cfg)
 		if err != nil {
 			return nil, err
diff --git a/server/replication.go b/server/replication.go
index 267a29b..445a813 100644
--- a/server/replication.go
+++ b/server/replication.go
@@ -38,7 +38,7 @@ func (m *MasterInfo) Save(filePath string) error {
 	filePathBak := fmt.Sprintf("%s.bak", filePath)
 
 	var fd *os.File
-	fd, err = os.OpenFile(filePathBak, os.O_CREATE|os.O_WRONLY, os.ModePerm)
+	fd, err = os.OpenFile(filePathBak, os.O_CREATE|os.O_WRONLY, 0644)
 	if err != nil {
 		return err
 	}
@@ -250,7 +250,7 @@ func (m *master) fullSync() error {
 	}
 
 	dumpPath := path.Join(m.app.cfg.DataDir, "master.dump")
-	f, err := os.OpenFile(dumpPath, os.O_CREATE|os.O_WRONLY, os.ModePerm)
+	f, err := os.OpenFile(dumpPath, os.O_CREATE|os.O_WRONLY, 0644)
 	if err != nil {
 		return err
 	}
diff --git a/store/boltdb/db.go b/store/boltdb/db.go
index f2cb1f3..15a0570 100644
--- a/store/boltdb/db.go
+++ b/store/boltdb/db.go
@@ -18,7 +18,7 @@ func (s Store) String() string {
 }
 
 func (s Store) Open(dbPath string, cfg *config.Config) (driver.IDB, error) {
-	os.MkdirAll(dbPath, os.ModePerm)
+	os.MkdirAll(dbPath, 0755)
 	name := path.Join(dbPath, "ledis_bolt.db")
 	db := new(DB)
 	var err error
diff --git a/store/goleveldb/db.go b/store/goleveldb/db.go
index 2a13f50..dad6a90 100644
--- a/store/goleveldb/db.go
+++ b/store/goleveldb/db.go
@@ -47,7 +47,7 @@ type DB struct {
 }
 
 func (s Store) Open(path string, cfg *config.Config) (driver.IDB, error) {
-	if err := os.MkdirAll(path, os.ModePerm); err != nil {
+	if err := os.MkdirAll(path, 0755); err != nil {
 		return nil, err
 	}
 
diff --git a/store/hyperleveldb/db.go b/store/hyperleveldb/db.go
index d6d7aeb..071dd38 100644
--- a/store/hyperleveldb/db.go
+++ b/store/hyperleveldb/db.go
@@ -28,7 +28,7 @@ func (s Store) String() string {
 }
 
 func (s Store) Open(path string, cfg *config.Config) (driver.IDB, error) {
-	if err := os.MkdirAll(path, os.ModePerm); err != nil {
+	if err := os.MkdirAll(path, 0755); err != nil {
 		return nil, err
 	}
 
diff --git a/store/leveldb/db.go b/store/leveldb/db.go
index 92a2419..ab29928 100644
--- a/store/leveldb/db.go
+++ b/store/leveldb/db.go
@@ -28,7 +28,7 @@ func (s Store) String() string {
 }
 
 func (s Store) Open(path string, cfg *config.Config) (driver.IDB, error) {
-	if err := os.MkdirAll(path, os.ModePerm); err != nil {
+	if err := os.MkdirAll(path, 0755); err != nil {
 		return nil, err
 	}
 
diff --git a/store/rocksdb/db.go b/store/rocksdb/db.go
index 1c79229..f3fb406 100644
--- a/store/rocksdb/db.go
+++ b/store/rocksdb/db.go
@@ -29,7 +29,7 @@ func (s Store) String() string {
 }
 
 func (s Store) Open(path string, cfg *config.Config) (driver.IDB, error) {
-	if err := os.MkdirAll(path, os.ModePerm); err != nil {
+	if err := os.MkdirAll(path, 0755); err != nil {
 		return nil, err
 	}
 
diff --git a/store/store.go b/store/store.go
index d620c03..aa4b485 100644
--- a/store/store.go
+++ b/store/store.go
@@ -27,7 +27,7 @@ func Open(cfg *config.Config) (*DB, error) {
 
 	path := getStorePath(cfg)
 
-	if err := os.MkdirAll(path, os.ModePerm); err != nil {
+	if err := os.MkdirAll(path, 0755); err != nil {
 		return nil, err
 	}