memcached安装

1、安装依赖软件

# yum -y install libevent libevent-devel perl-Test-Harness perl-Time-HiRes perl-TermReadKey perl-Test-Compile cpan perl perl-Test-Class
如果make test失败可以试试yum install perl-Test*
2、安装memcached
# cd /usr/local/src/
# wgethttp://www.memcached.org/files/memcached-1.4.29.tar.gz
# tar xvf memcached-1.4.29.tar.gz
# cd memcached-1.4.29
# ./configure --prefix=/usr/local/memcached
# make
# make test
# make install
3、启动memcached
# /usr/local/memcached/bin/memcached -d -m 128 -u root -p 11211 -U 11211 -P /tmp/memcached.pid
启动参数说明：/usr/local/memcached/bin/memcached -h 查看帮助
-P 是设置保存Memcache的pid文件
-c 选项是最大运行的并发连接数，默认是1024
-p 是设置Memcache的TCP监听的端口，最好是1024以上的端口，默认为11211
-l 是监听的服务器IP地址，默认为所有网卡。
-U 是设置Memcache的UDP监听端口
-u 是运行Memcache的用户，如果当前为root 的话，需要使用此参数指定用户。
-M return error on memory exhausted (rather than removing items)
-m 是分配给Memcache使用的内存数量，单位是MB，默认64MB
-d 选项是启动一个守护进程，
4、memcache开机启动
# vim /etc/rc.d/init.d/memcached

#!/bin/sh
#
# memcached: MemCached Daemon
#
# chkconfig: - 90 25
# description: MemCached Daemon
#
# Source function library.
. /etc/rc.d/init.d/functions
. /etc/sysconfig/network
#[ ${NETWORKING} = "no" ] && exit 0
#[ -r /etc/sysconfig/dund ] || exit 0
#. /etc/sysconfig/dund
#[ -z "$DUNDARGS" ] && exit 0
start()
{
echo -n $"Starting memcached: "
#如需修改启动参数，在这里修改
daemon $MEMCACHED -d -m 128 -u root -p 11211 -U 11211 -P /tmp/memcached.pid
echo
}
stop()
{
echo -n $"Shutting down memcached: "
killproc memcached
echo
}
#注意修改下面memcached的路径
MEMCACHED="/usr/local/memcached/bin/memcached"
[ -f $MEMCACHED ] || exit 1
# See how we were called.
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
stop
sleep 3
start
;;
*)
echo $"Usage: $0 {start|stop|restart}"
exit 1
esac
exit 0

# chmod 755 /etc/init.d/memcached
# chkconfig --add memcached
# chkconfig memcached on
# service memcached start
备注：另外也可以将启动命令加入/etc/rc.local，让memcached开机启动
5、清除缓存方法
方法1：telnet 127.0.0.1 11211 执行flush_all命令
方法2：重启memcached