Redis 环境的安装与测试
Redis 是 key-value 的NOSQL、独爱那些小而热的数据、典型"萝莉控"至于啥叫 key-value 呢？用RDBMS的观点、一言以辟之：
所谓 key：主键列
所谓 value：其他列
Redis 近几年很火、火到抬头不见、低头见
抬头望国外：著名成人网站 youporn 采用 100% Redis 每天 1亿 PV、解决了无数屌丝 YY 问题
低头思国内：新浪微博走的 Redis 之路、那叫一把眼泪一把辛酸呀
千里之行、始于安装、Let's 谈谈一次简单的安装步骤
㈠ 安装 Redis
# wget https://redis.googlecode.com/files/redis-2.6.13.tar.gz
# tar -zxv -f redis-2.6.13.tar.gz
# cd redis-2.6.13
# cd src
# make
# mkdir /etc/redis/
# cp redis.conf /etc/redis/redis.conf
# echo "1" > /proc/sys/vm/overcommit_memory
# make install
㈡ 设置 Redis 为后台守护进程
# cat /etc/redis/redis.conf | grep -in --color=auto 'daemonize'
16:# Note that Redis will write a pid file in /var/run/redis.pid when daemonized.
17:daemonize yes
㈢ 启动 Redis
# redis-server /etc/redis/redis.conf
# ps aux | grep redis
root 321110.00.0314961500 ? Ssl16:38 0:00 redis-server /etc/redis/redis.conf
root 321220.00.0 5128 676 pts/2 R+ 16:39 0:00 grep redis
㈣ 测试 Redis
# redis-cli
redis 127.0.0.1:6379> set name "David Lin"
OK
redis 127.0.0.1:6379> get name
"David Lin"
redis 127.0.0.1:6379> hset 192.168.1 David David@redis
(integer) 1
redis 127.0.0.1:6379> hget 192.168.1 David
"David@redis"
redis 127.0.0.1:6379> hset 192.168.1 root root@redis
(integer) 1
redis 127.0.0.1:6379> hget 192.168.1 root
"root@redis"
redis 127.0.0.1:6379> hkeys 192.168.1
1) "David"
2) "root"
redis 127.0.0.1:6379> hvals 192.168.1
1) "David@redis"
2) "root@redis"
redis 127.0.0.1:6379> hgetall 192.168.1
1) "David"
2) "David@redis"
3) "root"
4) "root@redis"
redis 127.0.0.1:6379> type name
string
redis 127.0.0.1:6379> type 192.168.1
hash
redis 127.0.0.1:6379> quit
㈤ 关闭 Redis
# redis-cli shutdown
㈥ 可能的错误
安装过程、或许您可能会有幸遇见：
zmalloc.o: In function `zmalloc_used_memory':
/root/redis/redis-2.6.13/src/zmalloc.c:223: undefined reference to `__sync_add_and_fetch_4'
collect2: ld 返回 1
make: *** 错误 1
make: Leaving directory `/root/redis/redis-2.6.13/src'
make: *** 错误 2
大概是内核有点老了、跟不上最新的Redis
# uname -r
2.6.18-308.el5xen
解决方案：
安装最新版的Tcl
# wget http://nchc.dl.sourceforge.net/project/tcl/Tcl/8.6.0/tcl8.6.0-src.tar.gz
# tar -zxv -f tcl8.6.0-src.tar.gz
# cd tcl8.6.0
# cd unix
# ./configure
# make
# make test
# make install
之后再做 2 件事：
① 在src/Makefile开头加 CFLAGS= -march=i686
② 编辑src/.make-settings里的OPT，改为OPT=-O2 -march=i686
行文至此、接近尾声、安装过程并不复杂、至于测试的命令嘛、下回更精彩 +_+
Good Luck
2013-05-30
By David Lin
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