Linux下安装memecache缓存程序

Memcache是一个高性能的分布式的内存对象缓存系统,通过在内存里维护一个统一的巨大的hash表,它能够用来存储各种格式的数据.简单的说就是将数据调用到内存中，然后从内存中读取，从而大大提高读取速度。

安装平台：centos4.7虚拟机

环境：mysql+apache+PHP5

所用到的安装包：

Libevent（memcached用到了libevent这个库，在编译时用到）下载：https://github.com/downloads/libevent/libevent/libevent-2.0.19-stable.tar.gz
memcache下载：http://www.danga.com/memcached/dist/

Libevent安装：

[root@localhost soft]# tar -zxf libevent-2.0.19-stable.tar.gz
[root@localhost soft]]# cd libevent-2.0.19-stable
[root@localhost libevent-2.0.19-stable]# ./configure --prefix=/usr
[root@localhost libevent-2.0.19-stable]# make
[root@localhost libevent-2.0.19-stable]# make install

安装后使用ls -al /usr/lib |grep libevent查看一下是否存在libevent。

memcache安装：

[root@localhost soft]# tar -zxf memcached-1.4.15.tar.gz
[root@localhost soft]]# cd memcached-1.4.15
[root@localhost memcached-1.4.15]# ./configure --with-libevent=/usr/
[root@localhost memcached-1.4.15]# make && make install

验证memcached是否安装成功：

[root@localhost memcached-1.4.15]# ls -al /usr/local/bin/mem*
-rwxr-xr-x 1 root root 244827 11-05 21:45 /usr/local/bin/memcached
[root@localhost memcached-1.4.15]# which memcached
/usr/local/bin/memcached
[root@localhost memcached-1.4.15]#

启动memcache：

[root@localhost bin]# memcached -d -u root    //开启memcache命令
[root@localhost bin]# netstat -anp            //查看memcache的默认端口11211是否启动
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name   
tcp        0      0 0.0.0.0:3306                0.0.0.0:*                   LISTEN      8031/mysqld         
tcp        0      0 0.0.0.0:11211               0.0.0.0:*                   LISTEN      20849/memcached 

通过telnet连接memcache：

[root@localhost bin]# telnet 127.0.0.1 11211
Trying 127.0.0.1...
Connected to localhost (127.0.0.1).
Escape character is '^]'.
stats
STAT pid 20849
STAT uptime 182
STAT time 1352123775
STAT version 1.4.15
STAT libevent 2.0.19-stable
STAT pointer_size 32
STAT rusage_user 0.000000
STAT rusage_system 0.005999
STAT curr_connections 10
STAT total_connections 11
STAT connection_structures 11
STAT reserved_fds 20
STAT cmd_get 0
STAT cmd_set 0
STAT cmd_flush 0
STAT cmd_touch 0
STAT get_hits 0
STAT get_misses 0
STAT delete_misses 0
STAT delete_hits 0
STAT incr_misses 0
STAT incr_hits 0
STAT decr_misses 0
STAT decr_hits 0
STAT cas_misses 0
STAT cas_hits 0
STAT cas_badval 0
STAT touch_hits 0
STAT touch_misses 0
STAT auth_cmds 0
STAT auth_errors 0
STAT bytes_read 7
STAT bytes_written 0
STAT limit_maxbytes 67108864
STAT accepting_conns 1
STAT listen_disabled_num 0
STAT threads 4
STAT conn_yields 0
STAT hash_power_level 16
STAT hash_bytes 262144
STAT hash_is_expanding 0
STAT bytes 0
STAT curr_items 0
STAT total_items 0
STAT expired_unfetched 0
STAT evicted_unfetched 0
STAT evictions 0
STAT reclaimed 0
END