diff --git a/src/redis-shake/common/cluster.go b/src/redis-shake/common/cluster.go
index a4cbeb7..8bf9df5 100644
--- a/src/redis-shake/common/cluster.go
+++ b/src/redis-shake/common/cluster.go
@@ -7,6 +7,10 @@ import (
 	"pkg/libs/log"
 )
 
+const(
+	RecvChanSize = 4096
+)
+
 /* implement redigo.Conn(https://github.com/garyburd/redigo)
  * Embed redis-go-cluster(https://github.com/chasex/redis-go-cluster)
  * The reason I create this struct is that redis-go-cluster isn't fulfill redigo.Conn
@@ -24,6 +28,10 @@ type reply struct {
 }
 
 func NewClusterConn(clusterClient *redigoCluster.Cluster, recvChanSize int) redigo.Conn {
+	if recvChanSize == 0 {
+		recvChanSize = RecvChanSize
+	}
+
 	return &ClusterConn{
 		client:   clusterClient,
 		recvChan: make(chan reply, recvChanSize),
diff --git a/src/redis-shake/restore.go b/src/redis-shake/restore.go
index ef1fef9..6286a58 100644
--- a/src/redis-shake/restore.go
+++ b/src/redis-shake/restore.go
@@ -174,6 +174,8 @@ func (dr *dbRestorer) restoreRDBFile(reader *bufio.Reader, target []string, auth
 							continue
 						}
 						utils.RestoreRdbEntry(c, e)
+
+						log.Debugf("routine[%v] restore key[%s] with value length[%v]", dr.id, e.Key, len(e.Value))
 					}
 				}
 			}()
diff --git a/src/redis-shake/sync.go b/src/redis-shake/sync.go
index 1545695..a3e126f 100644
--- a/src/redis-shake/sync.go
+++ b/src/redis-shake/sync.go
@@ -439,6 +439,7 @@ func (ds *dbSyncer) syncRDBFile(reader *bufio.Reader, target []string, auth_type
 							}
 						}
 						utils.RestoreRdbEntry(c, e)
+						log.Debugf("dbSyncer[%v] restore key[%s] with value length[%v]", ds.id, e.Key, len(e.Value))
 					}
 				}
 			}()