Clustercluster addslots（集群 槽位）cluster count failure reports（集群计数失败报告）cluster countkeysinslotcluster delslotscluster failovercluster forgetcluster getkeysinslotcluster infocluster keyslot（集群键槽）cluster meetcluster nodes（集群节点）cluster replicate（集群复制）cluster reset（集群重置）cluster saveconfigcluster set config epochcluster setslotcluster slavescluster slotsreadonlyreadwriteConnectionauthechopingquitselectswapdbGeogeoaddgeodistgeohashgeoposgeoradiusgeoradiusbymemberHasheshdelhexistshgethgetallhincrbyhincrbyfloathkeyshlenhmgethmsethscanhsethsetnxhstrlenhvalsHyperLogLogpfaddpfcountpfmergeKeysdeldumpexistsexpireexpireatkeysmigratemoveobjectpersistpexpirepexpireatpttlrandomkeyrenamerenamenxrestorescansorttouchttltypeunlinkwaitListsblpopbrpopbrpoplpushlindexlinsertllenlpoplpushlpushxlrangelremlsetltrimrpoprpoplpushrpushrpushxPub/SubpsubscribepublishpubsubpunsubscribesubscribeunsubscribeScriptingevalevalshascript debugscript existsscript flushscript killscript loadServerbgrewriteaofbgsaveclient getnameclient killclient listclient pauseclient replyclient setnamecommandcommand countcommand getkeyscommand infoconfig getconfig resetstatconfig rewriteconfig setdbsizedebug objectdebug segfaultflushallflushdbinfolastsavemonitorrolesaveshutdownslaveofslowlogtimeSetssaddscardsdiffsdiffstoresintersinterstoresismembersmemberssmovespopsrandmembersremsscansunionsunionstoreSorted SetszaddzcardzcountzincrbyzinterstorezlexcountzrangezrangebylexzrangebyscorezrankzremzremrangebylexzremrangebyrankzremrangebyscorezrevrangezrevrangebylexzrevrangebyscorezrevrankzscanzscorezunionstoreStringsappendbitcountbitfieldbitopbitposdecrdecrbygetgetbitgetrangegetsetincrincrbyincrbyfloatmgetmsetmsetnxpsetexsetsetbitsetexsetnxsetrangestrlenTransactionsdiscardexecmultiunwatchwatch
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RENAMENX key newkey
自1.0.0起可用。
时间复杂度： O（1）
重命名key为newkey如果newkey还不存在。它key不存在时会返回错误。
注意：在Redis 3.2.0之前，如果源和目标名称相同，则会返回错误。
返回值
整数回复，具体为：
1如果key被重命名为newkey。
0如果newkey已经存在。
例子
redis> SET mykey "Hello" "OK"
redis> SET myotherkey "World" "OK"
redis> RENAMENX mykey myotherkey (integer) 0
redis> GET myotherkey "World"