diff --git a/config/config.go b/config/config.go
index 85ec414..0939afb 100644
--- a/config/config.go
+++ b/config/config.go
@@ -34,7 +34,8 @@ type LevelDBConfig struct {
 }
 
 type LMDBConfig struct {
-	MapSize int `toml:"map_size" json:"map_size"`
+	MapSize int  `toml:"map_size" json:"map_size"`
+	NoSync  bool `toml:"nosync" json:"nosync"`
 }
 
 type BinLogConfig struct {
diff --git a/config/config.json b/config/config.json
index 82bc668..2710e0a 100644
--- a/config/config.json
+++ b/config/config.json
@@ -14,7 +14,8 @@
     },
 
     "lmdb" : {
-        "map_size" : 524288000
+        "map_size" : 524288000,
+        "nosync" : true
     },
 
     "access_log" : ""
diff --git a/config/config.toml b/config/config.toml
index 6ef9a6c..573db9a 100644
--- a/config/config.toml
+++ b/config/config.toml
@@ -34,6 +34,7 @@ max_open_files = 1024
 
 [lmdb]
 map_size = 524288000
+nosync = true
 
 [binlog]
 max_file_size = 0
diff --git a/etc/ledis.conf b/etc/ledis.conf
index 8d92919..2097f65 100644
--- a/etc/ledis.conf
+++ b/etc/ledis.conf
@@ -36,6 +36,7 @@ max_open_files = 1024
 
 [lmdb]
 map_size = 524288000
+nosync = true
 
 [binlog]
 # Set either size or num to 0 to disable binlog
diff --git a/store/hyperleveldb.go b/store/hyperleveldb.go
index f26631b..6ef70f1 100644
--- a/store/hyperleveldb.go
+++ b/store/hyperleveldb.go
@@ -1,3 +1,5 @@
+// +build hyperleveldb
+
 package store
 
 import (
diff --git a/store/hyperleveldb_test.go b/store/hyperleveldb_test.go
index 51bef8f..2d3a25b 100644
--- a/store/hyperleveldb_test.go
+++ b/store/hyperleveldb_test.go
@@ -1,3 +1,5 @@
+// +build hyperleveldb
+
 package store
 
 import (
diff --git a/store/mdb/mdb.go b/store/mdb/mdb.go
index 5a16463..ad767dc 100644
--- a/store/mdb/mdb.go
+++ b/store/mdb/mdb.go
@@ -23,6 +23,8 @@ type MDB struct {
 
 func (s Store) Open(path string, c *config.Config) (driver.IDB, error) {
 	mapSize := c.LMDB.MapSize
+	noSync := c.LMDB.NoSync
+
 	if mapSize <= 0 {
 		mapSize = 500 * 1024 * 1024
 	}
@@ -48,7 +50,12 @@ func (s Store) Open(path string, c *config.Config) (driver.IDB, error) {
 		}
 	}
 
-	err = env.Open(path, mdb.NOSYNC|mdb.NOMETASYNC|mdb.WRITEMAP|mdb.MAPASYNC|mdb.CREATE, 0755)
+	var flags uint = mdb.CREATE
+	if noSync {
+		flags |= mdb.NOSYNC | mdb.NOMETASYNC | mdb.WRITEMAP | mdb.MAPASYNC
+	}
+
+	err = env.Open(path, flags, 0755)
 	if err != nil {
 		return MDB{}, err
 	}