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本次主要介绍Redis的发布订阅、事务、脚本、连接、HyperLogLog
一、发布订阅
1>psubscribe,订阅一个或多个指定的频道
Reading messages... (press Ctrl-C to quit) 1) "psubscribe" 2) "tv1" 3) (integer) 1 127.0.0.1:6379> psubscribe tv2 tv3 \\指定订阅2个频道tv2 tv3 Reading messages... (press Ctrl-C to quit) 1) "psubscribe" 2) "tv2" 3) (integer) 1 1) "psubscribe" 2) "tv3" 3) (integer) 2
2>pubsub查看发布订阅系统
127.0.0.1:6379> PUBSUB channels (empty list or set)
3>publish给指定channel发送message
\\先订阅一个channel，然就一直监听着 127.0.0.1:6379> psubscribe tv1 Reading messages... (press Ctrl-C to quit) 1) "psubscribe" 2) "tv1" 3) (integer) 1 1) "pmessage" 2) "tv1" 3) "tv1" 4) "test" \\使用publish指定channel发送message 127.0.0.1:6379> publish www.jinr.com "test" (integer) 1
4>punsunbscribe退订所有给定的频道
redis 127.0.0.1:6379> PUNSUBSCRIBE mychannel \\官方的例子 1) "punsubscribe" 2) "a" 3) (integer) 1
5>sunbscribe订阅一个或多个频道信息
redis 127.0.0.1:6379> SUBSCRIBE mychannel \\官方给 例子 Reading messages... (press Ctrl-C to quit) 1) "subscribe" 2) "mychannel" 3) (integer) 1 1) "message" 2) "mychannel" 3) "a"
6>unsubscribe指定退订的频道
redis 127.0.0.1:6379> UNSUBSCRIBE mychannel \\官方的例子 1) "unsubscribe" 2) "a" 3) (integer) 0
二、事务
1>multi标记事务开始
127.0.0.1:6379> multi OK 127.0.0.1:6379> set name sunshine QUEUED 127.0.0.1:6379> set name sunshineboy QUEUED
2>exec执行所有事务块内的命令
127.0.0.1:6379> multi OK 127.0.0.1:6379> set name sunshine QUEUED 127.0.0.1:6379> set name sunshineboy QUEUED 127.0.0.1:6379> exec 1) OK 2) OK 127.0.0.1:6379> get name "sunshineboy"
3>discard取消所有事务块内的命令
127.0.0.1:6379> get name "sunshineboy" 127.0.0.1:6379> multi OK 127.0.0.1:6379> set name tom QUEUED 127.0.0.1:6379> exec 1) OK 127.0.0.1:6379> get name "tom" 127.0.0.1:6379> multi OK 127.0.0.1:6379> set name jeery QUEUED 127.0.0.1:6379> discard OK 127.0.0.1:6379> get name "tom"
4>watch乐观锁监视一个或多个key，如果在这个事务之前执行则打断该事务
127.0.0.1:6379> watch name OK 127.0.0.1:6379> set name jeery \\在执行multi事务前 OK 127.0.0.1:6379> multi OK 127.0.0.1:6379> set name sunshine QUEUED 127.0.0.1:6379> exec (nil) 127.0.0.1:6379> get name "jeery"
5>unwatch取消乐观锁，停止监视一个或多个key
127.0.0.1:6379> watch name OK 127.0.0.1:6379> unwatch OK
三、脚本
1>eval执行lua脚本
127.0.0.1:6379> eval "return {KEYS[1],KEYS[2],ARGV[1],ARGV[2]}" 2 key1 key2 first second1
1) "key1"
2) "key2"
3) "first"
4) "second1"
127.0.0.1:6379> eval "return {KEYS[1],KEYS[2],ARGV[1],ARGV[2]}" 2 key1 key2 first2 second1
1) "key1"
2) "key2"
3) "first2"
4) "second1"
127.0.0.1:6379> eval "return {KEYS[1],ARGV[1]}" 1 key1 tom
1) "key1"
2) "tom"
2>script load添加脚本到缓存，但不执行
127.0.0.1:6379> script load "return sunshine" "2e985836734751e115ec1eb4762d68ff62b9ca26"
3>script 杀死一个lua脚本
redis 127.0.0.1:6379> SCRIPT KILL OK
4>script flush从缓存移除所有脚本
127.0.0.1:6379> script flush OK
5>script exsits 查看一个缓存是否存在
127.0.0.1:6379> script load "return ‘sunshine‘" "f3d9b175455690a552555fa76ab4211638248c5b" 127.0.0.1:6379> script exists f3d9b175455690a552555fa76ab4211638248c5b 1) (integer) 1 127.0.0.1:6379> script flush OK 127.0.0.1:6379> script exists f3d9b175455690a552555fa76ab4211638248c5b 1) (integer) 0
6>evalsh执行一个lua脚本
127.0.0.1:6379> script load "return ‘sunshine‘" "f3d9b175455690a552555fa76ab4211638248c5b" 127.0.0.1:6379> evalsha "f3d9b175455690a552555fa76ab4211638248c5b" 0 "sunshine"
四、连接
1>select 切换指定数据库，默认0-15
127.0.0.1:6379> select 0 OK 127.0.0.1:6379> select 5 OK 127.0.0.1:6379[5]> select 10 OK 127.0.0.1:6379[10]> select 15 OK 127.0.0.1:6379[15]> select 16 (error) ERR invalid DB index
2>quit关闭当前连接当然还有其他方法exit或者Crtl+c
127.0.0.1:6379> quit [[email protected]_master ~]# redis-server -a xxxx 6467:C 28 Sep 22:24:12.514 # Fatal error, can‘t open config file ‘-a‘ [[email protected]_master ~]# redis-cli -a xxxx 127.0.0.1:6379> exit [[email protected]_master ~]# redis-cli -a xxxx 127.0.0.1:6379> [[email protected]_master ~]#
3>ping，测试是否redis是否存活
127.0.0.1:6379> ping PONG \\打开new session [[email protected]_master ~]# killall redis-server [[email protected]_master ~]# \\再次执行ping 127.0.0.1:6379> ping Could not connect to Redis at 127.0.0.1:6379: Connection refused
4>echo更bash一样
127.0.0.1:6379> echo Sunshine "Sunshine" 127.0.0.1:6379> echo SunshineBoy "SunshineBoy" 127.0.0.1:6379> echo SunshineBoySFZ "SunshineBoySFZ"
5>auth认证，在配置文件设定
[[email protected]_master ~]# vim /usr/local/redis3.0.4/etc/redis.conf ################################## SECURITY ################################### ... \\省略介绍信息 # requirepass PASSWORD \\设定密码并保存退出重启redis-server [[email protected]_master ~]# redis-cli 127.0.0.1:6379> kys * (error) ERR unknown command ‘kys‘ 127.0.0.1:6379> AUTH PASSWORD \\你在配置文件设定的密码 OK 127.0.0.1:6379> keys * 1) "name"
五、HyperLogLog
1>pfadd指定一个元素到HyperLogLog
127.0.0.1:6379> pfadd pfkey a b c d e f g (integer) 1 127.0.0.1:6379> pfcount pfkey (integer) 7
2>pfcount显示返回给定HyperLogLog基数
127.0.0.1:6379> pfadd pfkey a b c d e f g (integer) 1 127.0.0.1:6379> pfcount pfkey (integer) 7 127.0.0.1:6379> pfadd pfkey a b c d e f g (integer) 0 127.0.0.1:6379> pfadd pfkey a b c d e f g (integer) 0 127.0.0.1:6379> pfcount pfkey (integer) 7
3>pgmerge将多个HyperLogLog合并为一个
127.0.0.1:6379> pfadd pfkey3 aa bb cc dd (integer) 1 127.0.0.1:6379> pfadd pfkey4 a b c d (integer) 1 127.0.0.1:6379> pfcount pfkey3 (integer) 4 127.0.0.1:6379> pfcount pfkey4 (integer) 4 127.0.0.1:6379> pfmerge pfkey5 pfkey3 pfkey4 OK 127.0.0.1:6379> pfcount pfkey5 (integer) 8
至此Redis发布订阅、事务、脚本、连接、HyperLogLo就介绍完毕啦~明天或者后天就会谈到Redis服务器命令~ ^-^
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时间： 2024-08-03 11:24:40