ref： http://who0168.blog.51cto.com/253401/628347

这个例子很好

[@more@]

原文地址：

redis安装配置参见:ubuntu下redis安装配置 一.redis主从复制特点: 1.master可以拥有多个slave 2.多个slave可以连接同一个master外，还可以连接到其他slave 3.主从复制不会阻塞master，在同步数据时，master可以继续处理client请求 4.提高系统的伸缩性 5.可以在master禁用数据持久化，注释掉master配置文件中的所有save配置，只需在slave上配置数据持久化

二.redis主从复制过程:

当配置好slave后，slave与master建立连接，然后发送sync命令。无论是第一次连接还是重新连接，master都会启动一个后台进程，将 数据库快照保存到文件中，同时master主进程会开始收集新的写命令并缓存。后台进程完成写文件后，master就发送文件给slave，slave将 文件保存到硬盘上，再加载到内存中，接着master就会把缓存的命令转发给slave，后续master将收到的写命令发送给slave。如果 master同时收到多个slave发来的同步连接命令，master只会启动一个进程来写数据库镜像，然后发送给所有的slave。

三.redis主从配置:

配置具体参数含义参见: 【master】 daemonize yes pidfile /var/run/redis.pid port 6379 timeout 300 loglevel verbose logfile /usr/local/redis-2.2.12/var/log/redis.log databases 16 save 900 1 save 300 10 save 60 10000 rdbcompression yes dbfilename dump.rdb dir /usr/local/redis-2.2.12/var/data requirepass redis appendonly no appendfsync everysec no-appendfsync-on-rewrite no slowlog-log-slower-than 10000 slowlog-max-len 1024 vm-enabled no vm-swap-file /tmp/redis.swap vm-max-memory 0 vm-page-size 32 vm-pages 134217728 vm-max-threads 4 hash-max-zipmap-entries 512 hash-max-zipmap-value 64 list-max-ziplist-entries 512 list-max-ziplist-value 64 set-max-intset-entries 512 activerehashing yes

【slave】

daemonize yes pidfile /var/run/redis.pid port 6379 timeout 300 loglevel verbose logfile /usr/local/redis-2.2.12/var/log/redis.log databases 16 save 900 1 save 300 10 save 60 10000 rdbcompression yes dbfilename dump.rdb dir /usr/local/redis-2.2.12/var/data appendonly no appendfsync everysec no-appendfsync-on-rewrite no slowlog-log-slower-than 10000 slowlog-max-len 1024 vm-enabled no vm-swap-file /tmp/redis.swap vm-max-memory 0 vm-page-size 32 vm-pages 134217728 vm-max-threads 4 hash-max-zipmap-entries 512 hash-max-zipmap-value 64 list-max-ziplist-entries 512 list-max-ziplist-value 64 set-max-intset-entries 512 activerehashing yes slaveof 192.168.1.189 6379 masterauth redis

四.redis复制测试

查看master端日志: [8930] 31 Jul 19:16:09 - Accepted 192.168.1.136:54774 [8930] 31 Jul 19:16:09 * Slave ask for synchronization [8930] 31 Jul 19:16:09 * Starting BGSAVE for SYNC [8930] 31 Jul 19:16:09 * Background saving started by pid 10782 [10782] 31 Jul 19:16:09 * DB saved on disk [8930] 31 Jul 19:16:09 * Background saving terminated with success [8930] 31 Jul 19:16:09 * Synchronization with slave succeeded [8930] 31 Jul 19:16:14 - DB 0: 1 keys (0 volatile) in 4 slots HT. [8930] 31 Jul 19:16:14 - 1 clients connected (1 slaves), 807320 bytes in use

查看slave端日志:

[24398] 01 Aug 10:16:10 * Connecting to MASTER... [24398] 01 Aug 10:16:10 * MASTER SLAVE sync started: SYNC sent [24398] 01 Aug 10:16:10 * MASTER SLAVE sync: receiving 25 bytes from master [24398] 01 Aug 10:16:10 * MASTER SLAVE sync: Loading DB in memory [24398] 01 Aug 10:16:10 * MASTER SLAVE sync: Finished with success [24398] 01 Aug 10:16:15 - DB 0: 1 keys (0 volatile) in 4 slots HT. [24398] 01 Aug 10:16:15 - 1 clients connected (0 slaves), 798960 bytes in use

master端操作:

redis 127.0.0.1:6379> set k_m master OK slave端操作: redis 127.0.0.1:6379> get k_m "master"

原文地址：

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