diff --git a/xttbinlog/syncer/data_syncer.go b/xttbinlog/syncer/data_syncer.go
index a3b673c..a6480c0 100644
--- a/xttbinlog/syncer/data_syncer.go
+++ b/xttbinlog/syncer/data_syncer.go
@@ -91,6 +91,7 @@ func (ds *DataSyncer) Start() error {
 	return ds.canal.RunFrom(startPos)
 }
 
+// positionSaver 定期保存当前位置
 func (ds *DataSyncer) positionSaver() {
 	ticker := time.NewTicker(5 * time.Second)
 	defer ticker.Stop()
diff --git a/xttbinlog/xttbinlog b/xttbinlog/xttbinlog
new file mode 100644
index 0000000..1ed5843
Binary files /dev/null and b/xttbinlog/xttbinlog differ