diff --git a/config/config.go b/config/config.go
index 72c3105..551a798 100644
--- a/config/config.go
+++ b/config/config.go
@@ -59,6 +59,7 @@ type RocksDBConfig struct {
 	StatsDumpPeriodSec             int  `toml:"stats_dump_period_sec"`
 	BackgroundThreads              int  `toml:"background_theads"`
 	HighPriorityBackgroundThreads  int  `toml:"high_priority_background_threads"`
+	DisableWAL                     bool `toml:"disable_wal"`
 }
 
 type LMDBConfig struct {
@@ -169,6 +170,7 @@ func NewConfigDefault() *Config {
 	cfg.RocksDB.UseFsync = false
 	cfg.RocksDB.DisableAutoCompactions = false
 	cfg.RocksDB.AllowOsBuffer = true
+	cfg.RocksDB.DisableWAL = false
 
 	cfg.adjust()
 
diff --git a/config/config.toml b/config/config.toml
index 88f566b..a3b0833 100644
--- a/config/config.toml
+++ b/config/config.toml
@@ -82,7 +82,10 @@ max_background_flushes = 1
 allow_os_buffer = true
 enable_statistics = false
 stats_dump_period_sec = 3600
-
+# dangerous to set true, write may got lost after a crash
+# you can set true if replication opened, we may recover from replication log,
+# but it is still not a easy work.
+disable_wal = false
 
 [lmdb]
 map_size = 524288000
diff --git a/etc/ledis.conf b/etc/ledis.conf
index 88f566b..a3b0833 100644
--- a/etc/ledis.conf
+++ b/etc/ledis.conf
@@ -82,7 +82,10 @@ max_background_flushes = 1
 allow_os_buffer = true
 enable_statistics = false
 stats_dump_period_sec = 3600
-
+# dangerous to set true, write may got lost after a crash
+# you can set true if replication opened, we may recover from replication log,
+# but it is still not a easy work.
+disable_wal = false
 
 [lmdb]
 map_size = 524288000
diff --git a/store/rocksdb/db.go b/store/rocksdb/db.go
index 9bc7898..e1f10a4 100644
--- a/store/rocksdb/db.go
+++ b/store/rocksdb/db.go
@@ -150,9 +150,11 @@ func (db *DB) initOptions(cfg *config.RocksDBConfig) {
 
 	db.readOpts = NewReadOptions()
 	db.writeOpts = NewWriteOptions()
+	db.writeOpts.DisableWAL(cfg.DisableWAL)
 
 	db.syncOpts = NewWriteOptions()
 	db.syncOpts.SetSync(true)
+	db.syncOpts.DisableWAL(cfg.DisableWAL)
 
 	db.iteratorOpts = NewReadOptions()
 	db.iteratorOpts.SetFillCache(false)