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Cluster cluster addslots(集群 槽位) cluster count failure reports(集群计数失败报告) cluster countkeysinslot cluster delslots cluster failover cluster forget cluster getkeysinslot cluster info cluster keyslot(集群键槽) cluster meet cluster nodes(集群节点) cluster replicate(集群复制) cluster reset(集群重置) cluster saveconfig cluster set config epoch cluster setslot cluster slaves cluster slots readonly readwrite Connection auth echo ping quit select swapdb Geo geoadd geodist geohash geopos georadius georadiusbymember Hashes hdel hexists hget hgetall hincrby hincrbyfloat hkeys hlen hmget hmset hscan hset hsetnx hstrlen hvals HyperLogLog pfadd pfcount pfmerge Keys del dump exists expire expireat keys migrate move object persist pexpire pexpireat pttl randomkey rename renamenx restore scan sort touch ttl type unlink wait Lists blpop brpop brpoplpush lindex linsert llen lpop lpush lpushx lrange lrem lset ltrim rpop rpoplpush rpush rpushx Pub/Sub psubscribe publish pubsub punsubscribe subscribe unsubscribe Scripting eval evalsha script debug script exists script flush script kill script load Server bgrewriteaof bgsave client getname client kill client list client pause client reply client setname command command count command getkeys command info config get config resetstat config rewrite config set dbsize debug object debug segfault flushall flushdb info lastsave monitor role save shutdown slaveof slowlog time Sets sadd scard sdiff sdiffstore sinter sinterstore sismember smembers smove spop srandmember srem sscan sunion sunionstore Sorted Sets zadd zcard zcount zincrby zinterstore zlexcount zrange zrangebylex zrangebyscore zrank zrem zremrangebylex zremrangebyrank zremrangebyscore zrevrange zrevrangebylex zrevrangebyscore zrevrank zscan zscore zunionstore Strings append bitcount bitfield bitop bitpos decr decrby get getbit getrange getset incr incrby incrbyfloat mget mset msetnx psetex set setbit setex setnx setrange strlen Transactions discard exec multi unwatch watch
文字

UNLINK key [key ...]

自4.0.0起可用。

时间复杂度: O(1)每个键被删除而不管其大小。然后,命令O(N)在另一个线程中工作以回收内存,其中N是分配组成的已删除对象的分配数量。

该命令与 DEL 非常类似:它删除指定的键。就像 DEL 键一样,如果它不存在,它将被忽略。但是,该命令在不同的线程中执行实际的内存回收,因此它不会被阻塞,而 DEL 是。这是命令名称的来源:该命令只是键与键空间断开连接。实际的删除将在晚些时候异步完成。

返回值

整数回复:未链接的键数。

例子

redis>  SET key1 "Hello" "OK" 

redis>  SET key2 "World" "OK" 

redis>  UNLINK key1 key2 key3 ERR Unknown or disabled command 'UNLINK'

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