diff --git a/ChangeLog b/ChangeLog
index 11b15a2..0785933 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,7 +1,7 @@
 2019-06-07 Alibaba Cloud.
 	* VERSION: 1.6.6
 	* cherry-pick merge v1.4.4
-	*
+	* BUGFIX: delete single command failed when filter key given.
 2019-06-06 Alibaba Cloud.
 	* VERSION: 1.6.5
 	* IMPROVE: run rump in parallel to support several db nodes behind proxy.
diff --git a/src/redis-shake/command/redis-command.go b/src/redis-shake/command/redis-command.go
index 2913836..3245eef 100644
--- a/src/redis-shake/command/redis-command.go
+++ b/src/redis-shake/command/redis-command.go
@@ -17,7 +17,7 @@ var RedisCommands = map[string]redisCommand{
 	"setex":            {nil, 1, 1, 1},
 	"psetex":           {nil, 1, 1, 1},
 	"append":           {nil, 1, 1, 1},
-	"del":              {nil, 1, -1, 1},
+	"del":              {nil, 1, 0, 1},
 	"unlink":           {nil, 1, -1, 1},
 	"setbit":           {nil, 1, 1, 1},
 	"bitfield":         {nil, 1, 1, 1},
@@ -86,7 +86,7 @@ var RedisCommands = map[string]redisCommand{
 	"pfmerge": {nil, 1, -1, 1},
 }
 
-func GetMatchKeys(redis_cmd redisCommand, args [][]byte, filterkeys []string) (new_args [][]byte, ret bool) {
+func GetMatchKeys(redis_cmd redisCommand, args [][]byte, filterkeys []string) (new_args [][]byte, pass bool) {
 	lastkey := redis_cmd.lastkey - 1
 	keystep := redis_cmd.keystep
 
@@ -107,10 +107,10 @@ func GetMatchKeys(redis_cmd redisCommand, args [][]byte, filterkeys []string) (n
 		}
 	}
 
-	ret = false
+	pass = false
 	new_args = make([][]byte, number*redis_cmd.keystep+len(args)-lastkey-redis_cmd.keystep)
 	if number > 0 {
-		ret = true
+		pass = true
 		for i := 0; i < number; i++ {
 			for j := 0; j < redis_cmd.keystep; j++ {
 				new_args[i*redis_cmd.keystep+j] = args[array[i]+j]
@@ -124,5 +124,6 @@ func GetMatchKeys(redis_cmd redisCommand, args [][]byte, filterkeys []string) (n
 		new_args[number*redis_cmd.keystep+j] = args[i]
 		j = j + 1
 	}
+
 	return
 }
diff --git a/src/redis-shake/main/main.go b/src/redis-shake/main/main.go
index 500f718..3735ff4 100644
--- a/src/redis-shake/main/main.go
+++ b/src/redis-shake/main/main.go
@@ -374,7 +374,7 @@ func sanitizeOptions(tp string) error {
 		conf.Options.SenderDelayChannelSize = 32
 	}
 
-	if tp == TypeRestore || tp == TypeSync {
+	if tp == conf.TypeRestore || tp == conf.TypeSync || tp == conf.TypeRump {
 		// get target redis version and set TargetReplace.
 		for _, address := range conf.Options.TargetAddressList {
 			// single connection even if the target is cluster
diff --git a/src/redis-shake/sync.go b/src/redis-shake/sync.go
index bf87590..3a95b06 100644
--- a/src/redis-shake/sync.go
+++ b/src/redis-shake/sync.go
@@ -531,7 +531,7 @@ func (ds *dbSyncer) syncCommand(reader *bufio.Reader, target []string, auth_type
 			id := recvId.Get() // receive id
 
 			// print debug log of receive reply
-			log.Debugf("receive reply[%v]: [%v], error: [%v]", id, reply, err)
+			log.Debugf("receive reply-id[%v]: [%v], error:[%v]", id, reply, err)
 
 			if conf.Options.Metric == false {
 				continue
@@ -623,25 +623,28 @@ func (ds *dbSyncer) syncCommand(reader *bufio.Reader, target []string, auth_type
 						ds.nbypass.Incr()
 						// ds.SyncStat.BypassCmdCount.Incr()
 						metric.GetMetric(ds.id).AddBypassCmdCount(1)
+						log.Debugf("dbSyncer[%v] ignore command[%v]", ds.id, scmd)
 						continue
 					}
 				}
 
-				is_filter := false
+				pass := false
 				if len(conf.Options.FilterKey) != 0 {
-					ds, ok := command.RedisCommands[scmd]
+					cmdNode, ok := command.RedisCommands[scmd]
 					if ok && len(argv) > 0 {
-						new_argv, is_filter = command.GetMatchKeys(ds, argv, conf.Options.FilterKey)
+						log.Debugf("dbSyncer[%v] filter command[%v]", ds.id, scmd)
+						new_argv, pass = command.GetMatchKeys(cmdNode, argv, conf.Options.FilterKey)
 					} else {
-						is_filter = true
+						pass = true
 						new_argv = argv
 					}
 				} else {
-					is_filter = true
+					pass = true
 					new_argv = argv
 				}
-				if bypass || ignorecmd || !is_filter {
+				if bypass || ignorecmd || !pass {
 					ds.nbypass.Incr()
+					log.Debugf("dbSyncer[%v] filter command[%v]", ds.id, scmd)
 					continue
 				}
 			}