centos 下memcached 构建以及php memcache安装
centos 下memcached 构建以及php memcache安装memcached 与memcache的区别，请google
一、构建memcached 服务器（memcached服务端程序的安装）
1)memcached用到了libevent这个库,用于Socket的处理
[*]wget http://www.monkey.org/~provos/libevent-2.0.10-stable.tar.gz
[*]tar xzvf libevent-2.0.10-stable.tar.gz
[*]cd libevent-2.0.10-stable
[*]./configure --prefix=/usr
[*]make && make install
验证libevent是否正确安装
[*]ls -al /usr/lib |grep libevent
[*]# ls -al /usr/lib |grep libevent
[*]lrwxrwxrwx 1 root root 21 Feb 28 19:27 libevent-2.0.so.5 -> libevent-2.0.so.5.0.1
[*]-rwxr-xr-x 1 root root943520 Feb 28 19:27 libevent-2.0.so.5.0.1
[*]-rw-r--r-- 1 root root 1532202 Feb 28 19:27 libevent.a
[*]lrwxrwxrwx 1 root root 26 Feb 28 19:27 libevent_core-2.0.so.5 -> libevent_core-2.0.so.5.0.1
[*]-rwxr-xr-x 1 root root554374 Feb 28 19:27 libevent_core-2.0.so.5.0.1
[*]-rw-r--r-- 1 root root928010 Feb 28 19:27 libevent_core.a
[*]-rwxr-xr-x 1 root root 971 Feb 28 19:27 libevent_core.la
[*]lrwxrwxrwx 1 root root 26 Feb 28 19:27 libevent_core.so -> libevent_core-2.0.so.5.0.1
[*]lrwxrwxrwx 1 root root 27 Feb 28 19:27 libevent_extra-2.0.so.5 -> libevent_extra-2.0.so.5.0.1
[*]-rwxr-xr-x 1 root root410763 Feb 28 19:27 libevent_extra-2.0.so.5.0.1
[*]-rw-r--r-- 1 root root604266 Feb 28 19:27 libevent_extra.a
[*]-rwxr-xr-x 1 root root 978 Feb 28 19:27 libevent_extra.la
[*]lrwxrwxrwx 1 root root 27 Feb 28 19:27 libevent_extra.so -> libevent_extra-2.0.so.5.0.1
[*]-rwxr-xr-x 1 root root 936 Feb 28 19:27 libevent.la
[*]lrwxrwxrwx 1 root root 29 Feb 28 19:27 libevent_openssl-2.0.so.5 -> libevent_openssl-2.0.so.5.0.1
[*]-rwxr-xr-x 1 root root 85731 Feb 28 19:27 libevent_openssl-2.0.so.5.0.1
[*]-rw-r--r-- 1 root root120996 Feb 28 19:27 libevent_openssl.a
[*]-rwxr-xr-x 1 root root 1007 Feb 28 19:27 libevent_openssl.la
[*]lrwxrwxrwx 1 root root 29 Feb 28 19:27 libevent_openssl.so -> libevent_openssl-2.0.so.5.0.1
[*]lrwxrwxrwx 1 root root 30 Feb 28 19:27 libevent_pthreads-2.0.so.5 -> libevent_pthreads-2.0.so.5.0.1
[*]-rwxr-xr-x 1 root root 18094 Feb 28 19:27 libevent_pthreads-2.0.so.5.0.1
[*]-rw-r--r-- 1 root root 18678 Feb 28 19:27 libevent_pthreads.a
[*]-rwxr-xr-x 1 root root 999 Feb 28 19:27 libevent_pthreads.la
[*]lrwxrwxrwx 1 root root 30 Feb 28 19:27 libevent_pthreads.so -> libevent_pthreads-2.0.so.5.0.1
[*]lrwxrwxrwx 1 root root 21 Feb 28 19:27 libevent.so -> libevent-2.0.so.5.0.1
2)安装memcached
[*]wget http://memcached.googlecode.com/files/memcached-1.4.5.tar.gz
[*]tar xzvf memcached-1.4.5.tar.gz
[*]cd memcached-1.4.5
[*]./configure -–with-libevent=/usr
[*]make && make install
安装完成后,程序会将memcached 自动放到 /usr/local/bin/memcached
[*]# which memcached
[*]/usr/local/bin/memcached
3)安装PHP的memcache扩展
memcache 的项目下载地址
[*]http://pecl.php.net/package/memcache
安装code
[*]wget http://pecl.php.net/get/memcache-3.0.5.tgz
[*]tar xf memcache-3.0.5.tgz
[*]cd memcache-3.0.5
[*]./configure --enable-memcache --with-php-config=/usr/local/php/bin/php-config --with-zlib-dir
[*]make && make install
安装完成后，提示
[*]Installing shared extensions: /usr/local/php/lib/php/extensions/no-debug-non-zts-20090626/
配置php.ini文件
修改extension_dir:
[*]extension_dir = "/usr/local/php/lib/php/extensions/no-debug-non-zts-20090626/"
添加一行以便加载memcache扩展：extension=memcache.so
[*]extension=memcache.so
验证PHP中是否成功加载memcache扩展
[*]# php -m
[*]
[*]Core
[*]ctype
[*]curl
[*]date
[*]dom
[*]eAccelerator
[*]ereg
[*]fileinfo
[*]filter
[*]hash
[*]iconv
[*]json
[*]libxml
[*]mcrypt
[*]memcache
[*]mysql
[*]mysqli
[*]pcre
[*]PDO
[*]pdo_sqlite
[*]Phar
[*]posix
[*]Reflection
[*]session
[*]SimpleXML
[*]SPL
[*]SQLite
[*]sqlite3
[*]standard
[*]tokenizer
[*]xml
[*]xmlreader
[*]xmlwriter
[*]zlib
[*]
[*]
[*]eAccelerator
17行处，有memcahe,正确加载
后续：memcached基本配置
启动memcached 服务端程序：
[*]memcached -d -m 10 -u root -l localhost -p 11211 -c 256 -P /tmp/memcached.pid
各个参数的含义：
[*]-d选项是启动一个守护进程，
[*]-m是分配给Memcached使用的内存数量，单位是MB,
[*]-u是运行Memcache的用户，我这里是root，
[*]-l是监听的服务器IP地址,
[*]-p是设置Memcache监听的端口，最好是1024以上的端口，
[*]-c选项是最大运行的并发连接数，默认是1024,按照你服务器的负载量来设定，
[*]-P是设置保存Memcache的pid文件
PS:memcached 常用方法：
[*]kill `cat /tmp/memcached.pid`
[*]
[*]获取运行状态
[*]
[*]echo stats | nc 192.168.0.122 11200
[*]watch “echo stats | nc 192.168.0.122 11200 ” (实时状态)
[*]
[*]快速清空
[*]
[*]echo “flush_all” | nc 192.168.0.122 11200
[*]
[*]其他工具
[*]http://code.sixapart.com/svn/memcached/trunk/server/scripts/memcached-tool
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