[memcached]部署memcached環境及PHP擴展

Memcached用於動態Web應用以減輕數據庫負載。它通過在內存中緩存數據和對象來減少讀取數據庫的次數，從而提供動態、數據庫驅動網站的速度。部署步驟見下：
1.先安裝libevent：
tar zxvf libevent-2.0.15-stable.tar.gz
cd libevent-2.0.15-stable
./configure --prefix=/usr/local/webserver/libevent-2.0.15
make && make install

2.安裝memcached，同時需要在安裝中指定libevent的安裝位置
zxvf memcached-1.4.13.tar.gz
cd memcached-1.4.13
./configure --prefix=/usr/local/webserver/memcached-1.4.13 --with-libevent=/usr/local/webserver/libevent-2.0.15/
make && make install

啓動Memcache的服務器端：
/usr/local/webserver/memcached-1.4.13/bin/memcached -d -m 64 -u root -l 192.168.0.200 -p 11211 -c 256 –P /tmp/memcached.pid

3.附：php的memcached擴展的安裝：php有兩個memcached擴展，一個是memcache，一個是memcached
1)安裝libmemcached庫
tar zxvf libmemcached-0.50.tar.tar
cd libmemcached-0.50
./configure --prefix=/usr/local/webserver/libmemcached --with-memcached
make
make install
 
2)安裝php memcached擴展
zxvf memcached-1.0.2.tgz
cd memcached-1.0.2
/usr/local/webserver/php/bin/phpize
./configure --enable-memcached --with-php-config=/usr/local/webserver/php/bin/php-config --with-libmemcached-dir=/usr/local/webserver/libmemcached
make
make install

3)在php.ini裏添加
 vi /usr/local/webserver/php/etc/php.ini
extension_dir = "/usr/local/webserver/php/lib/php/extensions/no-debug-non-zts-20060613/"
extension = "memcache.so"
extension = "memcached.so"
再把服務重啓一下

vi /etc/ld.so.conf
/usr/local/webserver/libevent-2.0.15/bin
/usr/local/webserver/libmemcached/bin