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Redis安装及配置主从复制

2013-12-18 17:34 615 查看
http://blog.sina.com.cn/s/blog_6577a3b00101bb84.html

Redis是一个key-value存储系统。和Memcached类似,它支持存储的value类型相对更多,包括string(字符串)、 list(链表)、set(集合)和zset(有序集合)。这些数据类型都支持push/pop、add/remove及取交集并集和差集及更丰富的操
作,而且这些操作都是原子性的。在此基础上,redis支持各种不同方式的排序。与memcached一样,为了保证效率,数据都是缓存在内存中。区别的 是redis会周期性的把更新的数据写入磁盘或者把修改操作写入追加的记录文件,并且在此基础上实现了master-slave(主从)同步。Redis 是一个高性能的key-value数据库。

redis的出现,很大程度补偿了memcached这类key/value存储的不足,在部分场合可以对关系数据库起到很好的补充作用。它提供了Python,Ruby,Erlang,PHP客户端,使用很方便。(以上内容摘自百度百科)

一:下载redis并安装

[root@server11 ~]# wget http://redis.googlecode.com/files/redis-2.6.4.tar.gz
[root@server11 ~]# tar -zxvpf redis-2.6.4.tar.gz

[root@server11 ~]# cd redis-2.6.4

[root@server11 redis-2.6.4]# make install

32位操作系统上可能会出现如下报错:

zmalloc.o: In function `zmalloc_used_memory':

/root/redis-2.6.4/src/zmalloc.c:223: undefined reference to `__sync_add_and_fetch_4'

collect2: ld returned 1 exit status

make[1]: *** [redis-server] Error 1

make[1]: Leaving directory `/root/redis-2.6.4/src'

make: *** [all] Error 2

解决方案参考:

https://groups.google.com/forum/?fromgroups#!topic/redis-db/NI_d00he39o

二:编辑redis配置文件,启动redis

[root@server11 ~]# mkdir -p /usr/local/redis2/{bin,etc,var}

[root@server11 redis-2.6.4]# cp redis.conf /usr/local/redis2/etc/

[root@server11 redis-2.6.4]# cp /usr/local/bin/redis-* /usr/local/redis2/bin/

[root@server11 ~]# grep -v '^#' /usr/local/redis2/etc/redis.conf |grep -v '^$' //各参数含义在配置文件中有具体的解释和介绍

daemonize yes

pidfile /usr/local/redis2/var/redis.pid

port 6379

bind 192.168.1.112

timeout 300

loglevel notice

logfile stdout

databases 16

save 900 1

save 300 10

save 60 10000

stop-writes-on-bgsave-error yes

rdbcompression yes

rdbchecksum yes

dbfilename dump.rdb

dir ./

slave-serve-stale-data yes

slave-read-only yes

slave-priority 100

appendonly no

appendfsync everysec

no-appendfsync-on-rewrite no

auto-aof-rewrite-percentage 100

auto-aof-rewrite-min-size 64mb

lua-time-limit 5000

slowlog-log-slower-than 10000

slowlog-max-len 128

hash-max-ziplist-entries 512

hash-max-ziplist-value 64

list-max-ziplist-entries 512

list-max-ziplist-value 64

set-max-intset-entries 512

zset-max-ziplist-entries 128

zset-max-ziplist-value 64

activerehashing yes

client-output-buffer-limit normal 0 0 0

client-output-buffer-limit slave 256mb 64mb 60

client-output-buffer-limit pubsub 32mb 8mb 60

[root@server11 ~]# /usr/local/redis2/bin/redis-server /usr/local/redis2/etc/redis.conf

[root@server11 ~]# netstat -ntpl |grep 6379

tcp 0 0 192.168.1.112:6379 0.0.0.0:* LISTEN 6044/redis-server

[root@server11 ~]# /usr/local/redis2/bin/redis-cli -h 192.168.1.112

redis 192.168.1.112:6379> set number 100

OK

redis 192.168.1.112:6379> get number

"100"

redis 192.168.1.112:6379> del number

(integer) 1

redis 192.168.1.112:6379> get number

(nil)

redis 192.168.1.112:6379> quit

三: redis主从配置,关闭主节点的redis实例,复制/usr/local/redis2/目录至从节点

[root@server11 ~]# ps -ef |grep redis

root 6044 1 0 09:37 ? 00:00:00 /usr/local/redis2/bin/redis-server /usr/local/redis2/etc/redis.conf

root 6072 27475 0 09:44 pts/1 00:00:00 grep redis

[root@server11 ~]# kill 6044

[root@server11 ~]# scp -rvp /usr/local/redis2/ root@192.168.1.113:/usr/local/

[root@server12 ~]# grep -v '^#' /usr/local/redis2/etc/redis.conf |grep -v '^$' //注意红色字体部分

daemonize yes

pidfile /usr/local/redis2/var/redis.pid

port 6379

bind 192.168.1.113

timeout 300

loglevel notice

logfile stdout

databases 16

save 900 1

save 300 10

save 60 10000

stop-writes-on-bgsave-error yes

rdbcompression yes

rdbchecksum yes

dbfilename salve.rdb

dir ./

slaveof 192.168.1.112 6379

slave-serve-stale-data yes

slave-read-only yes

slave-priority 100

appendonly no

appendfsync everysec

no-appendfsync-on-rewrite no

auto-aof-rewrite-percentage 100

auto-aof-rewrite-min-size 64mb

lua-time-limit 5000

slowlog-log-slower-than 10000

slowlog-max-len 128

hash-max-ziplist-entries 512

hash-max-ziplist-value 64

list-max-ziplist-entries 512

list-max-ziplist-value 64

set-max-intset-entries 512

zset-max-ziplist-entries 128

zset-max-ziplist-value 64

activerehashing yes

client-output-buffer-limit normal 0 0 0

client-output-buffer-limit slave 256mb 64mb 60

client-output-buffer-limit pubsub 32mb 8mb 60

四:分别启动主从节点redis实例并测试

[root@server11 ~]# /usr/local/redis2/bin/redis-server /usr/local/redis2/etc/redis.conf

[root@server12 ~]# /usr/local/redis2/bin/redis-server /usr/local/redis2/etc/redis.conf

[root@server12 ~]# netstat -ntpl |grep 6379

tcp 0 0 192.168.1.113:6379 0.0.0.0:* LISTEN 16653/redis-server

[root@server11 ~]# /usr/local/redis2/bin/redis-cli -h 192.168.1.112

redis 192.168.1.112:6379> set number 1

OK

redis 192.168.1.112:6379> get number

"1"

redis 192.168.1.112:6379> quit

[root@server11 ~]# /usr/local/redis2/bin/redis-cli -h 192.168.1.113

redis 192.168.1.113:6379> get number

"1"

redis 192.168.1.113:6379> del number

(error) READONLY You can't write against a read only slave.

redis 192.168.1.113:6379> quit
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