diff --git a/conf/redis-shake.conf b/conf/redis-shake.conf
index 72873fa..66f2b35 100644
--- a/conf/redis-shake.conf
+++ b/conf/redis-shake.conf
@@ -16,8 +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/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 {