diff --git a/replication/binlog.go b/replication/binlog.go
index 677e087..1500b27 100644
--- a/replication/binlog.go
+++ b/replication/binlog.go
@@ -51,6 +51,7 @@ func (cfg *BinLogConfig) adjust() {
 		cfg.IndexName = "ledis"
 	}
 
+	//binlog not care space limit
 	cfg.SpaceLimit = -1
 
 	cfg.LogType = "bin"
diff --git a/replication/log.go b/replication/log.go
index e61e59d..175099d 100644
--- a/replication/log.go
+++ b/replication/log.go
@@ -145,7 +145,7 @@ func (l *Log) loadIndex() error {
 }
 
 func (l *Log) getLogFile() string {
-	return fmt.Sprintf("%s-%s.%05d", l.cfg.BaseName, l.cfg.LogType, l.lastLogIndex)
+	return fmt.Sprintf("%s-%s.%07d", l.cfg.BaseName, l.cfg.LogType, l.lastLogIndex)
 }
 
 func (l *Log) openNewLogFile() error {
diff --git a/replication/relaylog.go b/replication/relaylog.go
index 9f2b7a4..6b4894d 100644
--- a/replication/relaylog.go
+++ b/replication/relaylog.go
@@ -28,6 +28,7 @@ func (cfg *RelayLogConfig) adjust() {
 		cfg.IndexName = "ledis"
 	}
 
+	//relaylog not care file num
 	cfg.MaxFileNum = -1
 	cfg.LogType = "relay"
 }