diff --git a/src/redis-shake/common/command.go b/src/redis-shake/common/command.go
index 97ef810..678e95d 100644
--- a/src/redis-shake/common/command.go
+++ b/src/redis-shake/common/command.go
@@ -177,18 +177,4 @@ func GetAllClusterNode(client redigo.Conn, role string, choose string) ([]string
 	}
 
 	return result, nil
-}
-
-func WrapCommand(tp string, reply interface{}, err error) (interface{}, error) {
-	if err != nil {
-		return nil, fmt.Errorf("inner error: %v", err)
-	}
-	switch tp {
-	case ReplayString:
-		return redigo.Strings(reply, err)
-	case ReplayInt64s:
-		return redigo.Int64s(reply, err)
-	default:
-		return nil, fmt.Errorf("command type[%v] not support", tp)
-	}
 }
\ No newline at end of file
diff --git a/src/redis-shake/rump.go b/src/redis-shake/rump.go
index ce28efb..a921fcb 100644
--- a/src/redis-shake/rump.go
+++ b/src/redis-shake/rump.go
@@ -485,22 +485,20 @@ func (dre *dbRumperExecutor) doFetch(db int) error {
 			}
 
 			reply, err := dre.sourceClient.Do("")
-			dumpsRet, err := utils.WrapCommand(utils.ReplayString, reply, err)
+			dumps, err := redis.Strings(reply, err)
 			if err != nil && err != redis.ErrNil {
-				return fmt.Errorf("do dump with failed[%v]", err)
+				return fmt.Errorf("do dump with failed[%v], reply[%v]", err, reply)
 			}
-			dumps := dumpsRet.([]string)
 
 			// pipeline ttl
 			for _, key := range keys {
 				dre.sourceClient.Send("PTTL", key)
 			}
 			reply, err = dre.sourceClient.Do("")
-			pttlsRet, err := utils.WrapCommand(utils.ReplayInt64s, reply, err)
+			pttls, err := redis.Int64s(reply, err)
 			if err != nil && err != redis.ErrNil {
-				return fmt.Errorf("do ttl with failed[%v]", err)
+				return fmt.Errorf("do ttl with failed[%v], reply[%v]", err, reply)
 			}
-			pttls := pttlsRet.([]int64)
 
 			dre.stat.rCommands.Add(int64(len(keys)))
 			for i, k := range keys {