memcached编译安装
实现memcached的编译安装及将memcached添加为系统服务一.编译安装memcached
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[*] # yum install libevent libevent-devel -y //memcached借助libevent与客户端通信是来实现的，所以需要先安装libevent,libevent-devel
[*] # cd /usr/local/src
[*] # wget http://memcached.googlecode.com/files/memcached-1.4.5.tar.gz
[*] # tar -xvzf memcached-1.4.5.tar.gz
[*] # cd memcached-1.4.5
[*] # ./configure --prefix=/usr/local/memcached
[*] # make && make install
至此，memcached就安装成功。可以以下方式开启memcached守护进程，使用默认端口11211
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[*] # /usr/local/memcached/bin/memcached -d -m 10 -u root -l 127.0.0.1 -p 11211 -c 64 -P /tmp/memcached.pid
[*] -d选项是启动一个守护进程，
[*] -m是分配给Memcache使用的内存数量，单位是MB，我这里是10MB，
[*] -u是运行Memcache的用户，我这里是root，
[*] -l是监听的服务器IP地址，如果有多个地址的话，我这里指定了服务器的IP地址192.168.0.200，
[*] -p是设置Memcache监听的端口，我这里设置了12000，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，我这里设置了256，按照你服务器的负载量来设定，
[*] -P是设置保存Memcache的pid文件，我这里是保存在/tmp/memcached.pid
二.添加memcached为系统服务
1.拷贝memcached源码包的memcached.sysv拷贝到/etc/init.d，做为memcached的启动脚本
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[*] # cp /usr/local/src/memcached-1.4.5/scripts/memcached.sysv /etc/init.d/memcached //将memcached源码包的memcached.sysv拷贝到/etc/init.d，做为memcached的启动脚本
2.修改/etc/init.d/memcached
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[*] # vim /etc/init.d/memcached//修改USER等，需要修改的都用//表示
[*] #!/bin/sh
[*] #
[*] # chkconfig: - 55 45
[*] # description:The memcached daemon is a network memory cache service.
[*] # processname: memcached
[*] # config: /etc/sysconfig/memcached
[*]
[*] # Source function library.
[*] . /etc/rc.d/init.d/functions
[*]
[*] PORT=11211
[*] USER=root//更改用户为root
[*] MAXCONN=64
[*] CACHESIZE=10
[*] OPTIONS=""
[*]
[*] if [ -f /etc/sysconfig/memcached ];then
[*] . /etc/sysconfig/memcached
[*] fi
[*]
[*] # Check that networking is up.
[*] if [ "$NETWORKING" = "no" ]
[*] then
[*] exit 0
[*] fi
[*]
[*] RETVAL=0
[*] prog="memcached"
[*]
[*] start () {
[*] echo -n $"Starting $prog: "
[*] # insure that /var/run/memcached has proper permissions
[*] # chown $USER /usr/local/memcached//在此行前加#注释此行，感觉没用
[*] daemon /usr/local/memcached/bin/memcached -d -p $PORT -u $USER-m $CACHESIZE -c $MAXCONN -P /tmp/memcached.pid $OPTIONS//修改daemon memcached为daemon /usr/local/memcached/bin/memcached，不然/etc/init.d/memcached时会显示/bin/sh memcached command not found
[*] RETVAL=$?
[*] echo
[*] [ $RETVAL -eq 0 ] && touch /var/lock/subsys/memcached
[*] }
[*] stop () {
[*] echo -n $"Stopping $prog: "
[*] killproc memcached
[*] RETVAL=$?
[*] echo
[*] if [ $RETVAL -eq 0 ] ; then
[*] rm -f /var/lock/subsys/memcached
[*] rm -f /var/run/memcached.pid
[*] fi
[*] }
[*]
[*] restart () {
[*] stop
[*] start
[*] }
[*]
[*]
[*] # See how we were called.
[*] case "$1" in
[*] start)
[*] start
[*] ;;
[*] stop)
[*] stop
[*] ;;
[*] status)
[*] status memcached
[*] ;;
[*] restart|reload)
[*] restart
[*] ;;
[*] condrestart)
[*] [ -f /var/lock/subsys/memcached ] && restart || :
[*] ;;
[*] *)
[*] echo $"Usage: $0 {start|stop|status|restart|reload|condrestart}"
[*] exit 1
[*] esac
[*]
[*] exit $?
3.添加系统服务
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[*] # chmod 755 /etc/init.d/memcached
[*] # chkconfig --add memcached
[*] # chkconfig memcached on
[*] # service memcached start//开启memcached服务
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