set sender count to 4096 if target redis type is cluster

conf/redis-shake.conf

@@ -189,7 +189,7 @@ sender.size = 104857600
 # sender flush buffer size of oplog number.
 # used in `sync`.
 # 发送缓存的报文个数，超过这个阈值将会强行刷缓存发送
-sender.count = 5000
+sender.count = 4096
 # delay channel size. once one oplog is sent to target redis, the oplog id and timestamp will also
 # stored in this delay queue. this timestamp will be used to calculate the time delay when receiving
 # ack from target redis.

src/redis-shake/main/main.go

@@ -396,6 +396,9 @@ func sanitizeOptions(tp string) error {
 		// set to default when not set
 		conf.Options.SenderCount = defaultSenderCount
 	}
+	if conf.Options.TargetType == conf.RedisTypeCluster && conf.Options.SenderCount > utils.RecvChanSize {
+		conf.Options.SenderCount = utils.RecvChanSize
+	}
 
 	if conf.Options.SenderDelayChannelSize == 0 {
 		conf.Options.SenderDelayChannelSize = 32