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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
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MSETNX key value [key value ...]

自1.0.1起可用。

时间复杂度: O(N)其中N是要设置的键的数量。

将给定的键设置为它们各自的值。即使只有一个密钥已经存在,MSETNX 也不会执行任何操作。

由于这种语义,可以使用 MSETNX 来设置代表唯一逻辑对象的不同字段的不同键,以确保所有字段或根本不设置所有字段。

MSETNXT是原子的,所以所有给定的键都被设置一次。客户不可能看到某些密钥已更新,而其他密钥未更改。

返回值

整数回复,具体为:

  • 1 如果所有的键都设置好了。

  • 0 如果没有设置密钥(至少有一个密钥已经存在)。

例子

redis>  MSETNX key1 "Hello" key2 "there" (integer) 1 redis>  MSETNX key2 "there" key3 "world" (integer) 0 redis>  MGET key1 key2 key3 1) "Hello" 2) "there" 3) (nil)

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