Redis 4.0 Commands

DCS for Redis 4.0 is developed based on Redis 4.0.14 and is compatible with open-source protocols and commands.

This section describes DCS for Redis 4.0's compatibility with Redis commands, including supported and disabled commands. For more information about the command syntax, visit the Redis official website.

DCS for Redis instances support most Redis commands, which are listed in Commands Supported by DCS for Redis 4.0. Any client compatible with the Redis protocol can access DCS.

For security purposes, some Redis commands are disabled in DCS, as listed in Commands Disabled by DCS for Redis 4.0.
Some Redis commands are supported by cluster DCS instances for multi-key operations in the same slot. For details, see Command Restrictions.
Some Redis commands have usage restrictions, which are described in Other Command Usage Restrictions.

Commands Supported by DCS for Redis 4.0

Table 1 and Table 2 list the Redis commands supported by single-node, master/standby, and Redis Cluster DCS Redis 4.0 instances.

Commands available since later Redis versions are not supported by earlier-version instances. Run a command on redis-cli to check whether it is supported by DCS for Redis. If the message "(error) ERR unknown command" is returned, the command is not supported.
For DCS Redis 4.0 instances in the Redis Cluster mode, ensure that all commands in a pipeline are executed on the same shard.

**Table 1** Commands supported by single-node, master/standby, and Redis Cluster DCS Redis 4.0 instances (1)
Keys	String	Hash	List	Set	Sorted Set	Server
DEL	APPEND	HDEL	BLPOP	SADD	ZADD	FLUSHALL
DUMP	BITCOUNT	HEXISTS	BRPOP	SCARD	ZCARD	FLUSHDB
EXISTS	BITOP	HGET	BRPOPLRUSH	SDIFF	ZCOUNT	DBSIZE
EXPIRE	BITPOS	HGETALL	LINDEX	SDIFFSTORE	ZINCRBY	TIME
MOVE	DECR	HINCRBY	LINSERT	SINTER	ZRANGE	INFO
PERSIST	DECRBY	HINCRBYFLOAT	LLEN	SINTERSTORE	ZRANGEBYSCORE	KEYS
PTTL	GET	HKEYS	LPOP	SISMEMBER	ZRANK	CLIENT KILL
RANDOMKEY	GETRANGE	HMGET	LPUSHX	SMEMBERS	ZREMRANGEBYRANK	CLIENT LIST
RENAME	GETSET	HMSET	LRANGE	SMOVE	ZREMRANGEBYCORE	CLIENT GETNAME
RENAMENX	INCR	HSET	LREM	SPOP	ZREVRANGE	CLIENT SETNAME
RESTORE	INCRBY	HSETNX	LSET	SRANDMEMBER	ZREVRANGEBYSCORE	CONFIG GET
SORT	INCRBYFLOAT	HVALS	LTRIM	SREM	ZREVRANK	MONITOR
TTL	MGET	HSCAN	RPOP	SUNION	ZSCORE	SLOWLOG
TYPE	MSET	HSTRLEN	RPOPLPU	SUNIONSTORE	ZUNIONSTORE	ROLE
SCAN	MSETNX	HLEN	RPOPLPUSH	SSCAN	ZINTERSTORE	SWAPDB
OBJECT	PSETEX	-	RPUSH	-	ZSCAN	MEMORY
PEXPIRE	SET	-	RPUSHX	-	ZRANGEBYLEX	CONFIG
PEXPIREAT	SETBIT	-	LPUSH	-	ZLEXCOUNT	COMMAND
-	SETEX	-	-	-	ZREMRANGEBYSCORE	-
-	SETNX	-	-	-	ZREM	-
-	SETRANGE	-	-	-	-	-
-	STRLEN	-	-	-	-	-
-	BITFIELD	-	-	-	-	-

**Table 2** Commands supported by single-node, master/standby, and Redis Cluster DCS Redis 4.0 instances (2)
HyperLoglog	Pub/Sub	Transactions	Connection	Scripting	Geo
PFADD	PSUBSCRIBE	DISCARD	AUTH	EVAL	GEOADD
PFCOUNT	PUBLISH	EXEC	ECHO	EVALSHA	GEOHASH
PFMERGE	PUBSUB	MULTI	PING	SCRIPT EXISTS	GEOPOS
-	PUNSUBSCRIBE	UNWATCH	QUIT	SCRIPT FLUSH	GEODIST
-	SUBSCRIBE	WATCH	SELECT (not supported by Redis Cluster instances)	SCRIPT KILL	GEORADIUS
-	UNSUBSCRIBE	-	-	SCRIPT LOAD	GEORADIUSBYMEMBER

Commands Disabled by DCS for Redis 4.0

The following lists commands disabled by DCS for Redis 4.0.

**Table 3** Redis commands disabled in single-node and master/standby DCS Redis 4.0 instances
Keys	Server
MIGRATE	SLAVEOF
-	SHUTDOWN
-	LASTSAVE
-	DEBUG commands
-	SAVE
-	BGSAVE
-	BGREWRITEAOF
-	SYNC
-	PSYNC

**Table 4** Redis commands disabled in Redis Cluster DCS Redis 4.0 instances
Keys	Server	Cluster
MIGRATE	SLAVEOF	CLUSTER MEET
-	SHUTDOWN	CLUSTER FLUSHSLOTS
-	LASTSAVE	CLUSTER ADDSLOTS
-	DEBUG commands	CLUSTER DELSLOTS
-	SAVE	CLUSTER SETSLOT
-	BGSAVE	CLUSTER BUMPEPOCH
-	BGREWRITEAOF	CLUSTER SAVECONFIG
-	SYNC	CLUSTER FORGET
-	PSYNC	CLUSTER REPLICATE
-	-	CLUSTER COUNT-FAILURE-REPORTS
-	-	CLUSTER FAILOVER
-	-	CLUSTER SET-CONFIG-EPOCH
-	-	CLUSTER RESET