一、Redis配置、安装等
1、Redis简介及优点
REmote DIctionary Server(Redis) 是一个由Salvatore Sanfilippo写的key-value存储系统。Redis提供了一些丰富的数据结构，包括lists, sets, ordered sets以及 hashes ，当然还有和Memcached一样的 strings结构.Redis当然还包括了对这些数据结构的丰富操作。
Redis的优点
性能极高 – Redis能支持超过 100K+ 每秒的读写频率。丰富的数据类型 – Redis支持二进制案例的 Strings, Lists, Hashes, Sets 及 Ordered Sets 数据类型操作。原子 – Redis的所有操作都是原子性的，同时Redis还支持对几个操作全并后的原子性执行。丰富的特性 – Redis还支持 publish/subscribe, 通知, key 过期等等特性。
2、VPS下的安装
Debian下的安装：
wget http://download.redis.io/releases/redis-2.8.9.tar.gztar xvfz redis-2.8.9.tar.gzcd redis-2.8.9sudo makesudo make install
Centros下的安装：
wget http://download.redis.io/releases/redis-2.8.19.tar.gztar xzf redis-2.8.19.tar.gzcd redis-2.8.19make
3、复制文件
把src目录下的几个可执行文件redis-benchmark,redis-check-aof,redis-check-dump,redis-cli,redis-sentinel,redis-server和redis.conf文件复制到你所希望的地方，比如我是复制到/usr/local/redis/bin 和/usr/local/redis/etc 下面的，命令如下：
mkdir -p /usr/local/redis/{bin,etc,var}/bin/cp src/{redis-benchmark,redis-check-aof,redis-check-dump,redis-cli,redis-sentinel,redis-server} /usr/local/redis/bin//bin/cp redis.conf /usr/local/redis/etc/ln -s /usr/local/redis/bin/* /usr/local/bin/sed -i ‘s@pidfile.*$@pidfile /var/run/redis.pid@’ /usr/local/redis/etc/redis.confsed -i ‘s@logfile.*$@logfile /usr/local/redis/var/redis.log@’ /usr/local/redis/etc/redis.confsed -i ‘s@^dir.*$@dir /usr/local/redis/var@’ /usr/local/redis/etc/redis.confsed -i ‘s@daemonize no@daemonize yes@’ /usr/local/redis/etc/redis.confecho ‘vm.overcommit_memory = 1’ >> /etc/sysctl.confsysctl -p
4、配置开机自启动redis-server
Debian下：wget https://github.com/ijonas/dotfiles/raw/master/etc/init.d/redis-serverwget https://github.com/ijonas/dotfiles/raw/master/etc/redis.confsudo mv redis-server /etc/init.d/redis-serversudo chmod +x /etc/init.d/redis-serversudo mv redis.conf /etc/redis.conf
sudo useradd redissudo mkdir -p /var/lib/redissudo mkdir -p /var/log/redissudo chown redis.redis /var/lib/redissudo chown redis.redis /var/log/redis
Centros下：wget https://raw.githubusercontent.com/lj2007331/lnmp/master/init/Redis-server-init-CentOSmv Redis-server-init-CentOS /etc/init.d/redis-serverchmod +x /etc/init.d/redis-serverchkconfig –add redis-serverchkconfig redis-server
5、启动redisDebian下：sudo update-rc.d redis-server defaultssudo /etc/init.d/redis-server start
Centros下：service redis-server start
6、测试
/usr/local/redis/bin/redis-cliredis 127.0.0.1:6379> set name wiki8OKredis 127.0.0.1:6379> get name“wiki8”
7、关闭redis
service redis-server stop
二、配置WordPress
1、使wordpress支持Redis
推荐predis. 加入WordPress的根目录，执行下面
wget http://uploads.staticjw.com/ji/jim/predis.phpchown www.www ./predis.php
2、前端缓存的PHP脚本
加入WordPress的根目录，执行下面
wget https://gist.githubusercontent.com/JimWestergren/3053250/raw/d9e279e31cbee4a1520f59108a4418ae396b2dde/index-with-redis.phpchown www.www ./index-with-redis.php
根据自己需求修改index-with-redis.php，修改如下：
$cf = 0; // set to 1 if you are using cloudflare$debug = 1; // set to 1 if you wish to see execution time and cache actions$display_powered_by_redis = 0; // set to 1 if you want to display a powered by redis message with execution time, see below
替换index.php
mv index.php index.php_bk #替换到原来的index.php，也可以改nginx伪静态规则mv index-with-redis.php index.php
参考资料：http://redis.io/How to load WordPress in a few milliseconds using RedisRedis简介和安装wordpress启动Redis缓存加速ubuntu安装启动redis
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