redis pubsub

Write Redis client by yourself-Redis protocol (1), redis Client Network Layer The client interacts with the server over TCP connections. The default port number of the server is 6379. All commands or data sent by the client and server end with \ r \ n (CRLF.Request The Redis Server accepts commands and command paramete

System Environment: Os:oracle Linux Enterprise 5.6 redis:redis-2.6.8 python:python-2.7.3 Redis Python package version: Redis-2.7.2.tar Prerequisites: 1. Ensure that the Redis has been successfully installed and properly configured, reference documentation Master-Slave Copy Document: http://blog.csdn.net/lichangzai/article/details/8669674 Parameter Description Do

landing function, using Redis is more appropriate than using memcached.Some of the peripheral features of RedisIn addition to being stored as storage, Redis also provides some other functions, such as aggregation calculation, pubsub, scripting, etc., for such functions need to understand its implementation principle, clearly understand its limitations, can be us

[Redis] 3. Redis cluster deployment and redis cluster deployment A Redis cluster is an assembly that provides data sharing among multiple Redis nodes.Redis clusters do not support the processing of multiple keys commands, because this requires moving data between different n

', 'pexpireat', 'ping', 'pipeline', 'pttl ', 'Publish', 'pubsub ', 'randkey', 'register _ script ', 'rename', 'renamenx', 'response _ callbacks', 'rpop ', 'rpoplpush', 'rptu', 'rpushx', 'sadd', 'save ', 'scard ', 'script _ exists', 'script _ flush', 'script _ kill ', 'script _ load', 'sdid', 'sdiffstore', 'set ', 'Set _ response_callback', 'setbit ', 'setex', 'setnx ', 'setrange', 'shutdown', 'sinter ', 'sinterstore', 'sismember ', 'slaveof ', 'smemb

functionality of persistence and replication.5. Client support for different languagesMemcached and Redis have rich third-party clients to choose from for different language clients, but because memcached has been developing for a longer period of time, many of Memcached's clients are more mature and stable in terms of client support at present. and Redis because its protocol itself is more complex than me

calculation, pubsub, scripting, etc., for such functions need to understand its implementation principle, clearly understand its limitations, can be used correctly, such as pubsub function, This is actually not supported by any persistence, the consumer connection between the flash or the reconnection between the message is all lost, and such as aggregation calculation and scripting and other features are

1.0 prerequisites Objective: To have a conceptual understanding of what a memory-type database is .? Read the following five blog posts about the redis series. This ID will be added one after another. This ID redis Series 1. 0: first, this is your official redis Website: Http://www.redis.cn/ 1.1 you need to download, install, and configure

Redis cluster _ 3. redis master-slave automatic switch Sentinel, redis_3.redisRedis SentinelSentinel (Sentinel) is a tool used to monitor the Master Status in redis clusters. It has been integrated into redis2.4 + versions.I. Role of Sentinel:1): Master status detection2) If the Master node is abnormal, the Master-Slave switch will be performed, and one of the Sl

用如果批量执行的命令数量过大，则很容易对网络及客户端造成很大影响，此时可以把命令分割，每次发送少量的命令到服务端执行pipeline每次只能作用在一个Redis节点上3. Publishing a role in a subscription 3.1 release subscription发布者(publisher)订阅者(subscriber)频道(channel)3.2 Model for publishing subscriptionsRedis server就相当于频道发布者是一个redis-cli，通过redis server发布消息订阅者也是于一个redis-cli,如果订阅了这个频道，就可以通过

Redis cluster _ 4. redis STARTUP script, redis_4.redis Redis STARTUP script: # Vi/etc/init. d/redis #!/usr/bin/env bash## redis start up the redis server daemon## chkconfig: 345 99 99

Notice Databases 16 Dir/opt/redis/instance/ins7000/data Slave-serve-stale-data Yes #slave只读 Slave-read-only Yes #not Use default Repl-disable-tcp-nodelay Yes Slave-priority 100 #打开aof持久化 AppendOnly Yes #每秒一次aof写 Appendfsync everysec Fsync the new write operation when #关闭在aof rewrite No-appendfsync-on-rewrite Yes Auto-aof-rewrite-min-size 64MB Lua-time-limit 5000 #打开redis集群

also provides the functionality of persistence and replication.5. Client support for different languagesMemcached and Redis have rich third-party clients to choose from for different language clients, but because memcached has been developing for a longer period of time, many of Memcached's clients are more mature and stable in terms of client support at present. and Redis because its protocol itself is mo

deployed on the same machine in cluster-require-full-coverage no #, and switches off auto-aof-rewrite, prevents all redis processes in fork from performing rewrite in an instant, A large amount of memory is occupied. auto-aof-rewrite-percentage contains too many slowlog-max-len 128366y-keyspace-events "" hash-max-ziplist-entries contains too many concurrent threads 64 activerehashing yesclient-output-buffer-li 0client-output-buffer-limit slave 256 mb

Suppose two redis servers, IP: 192.168.1.101 and 192.168.1.103, how do I access Redis on 101 through REDIS-CLI on the 103? before remote connection 103, let's talk about some key parameters of Redis-cli:Usage: redis-cli [OPTIONS] [cmd [arg [arg ...]]-H -p -A --help, display

#GENERALDaemonize NoTcp-backlog 511Timeout 0Tcp-keepalive 0LogLevel NoticeDatabases 16Dir/var/redis/dataSlave-serve-stale-data Yes#slave只读Slave-read-only Yes#not Use defaultRepl-disable-tcp-nodelay YesSlave-priority 100#打开aof持久化AppendOnly Yes#每秒一次aof写Appendfsync everysecThe new write operation is fsync when the #关闭在aof rewriteNo-appendfsync-on-rewrite YesAuto-aof-rewrite-min-size 64MBLua-time-limit 5000#打开redis