Memcached安装和使用

先安装 libevent
再安装 Memcached主程序

安装 libevent
# tar zxvf libevent-1.4.9-stable.tar.gz # cd libevent-1.4.9-stable # ./configure --prefix=/usr # make # make install

安装 Memcached
# tar zxvf memcached-1.2.6.tar.gz # cd memcached-1.2.6 # ./configure --prefix=/usr/local # make # make install

或者

# rpm -Uhv http://apt.sw.be/redhat/el5/en/i386/rpmforge/RPMS/rpmforge-release-0.3.6-1.el5.rf.i386.rpm # yum install memcached # memcached -h

测试是否成功安装memcached：

# ls -al /usr/local/bin/mem* -rwxr-xr-x 1 root root 137986 11?? 12 17:39 /usr/local/bin/memcached -rwxr-xr-x 1 root root 140179 11?? 12 17:39 /usr/local/bin/memcached-debug

memcached的基本设置 ：
1.启动Memcache的服务器端：
# /usr/local/bin/memcached -d -m 10 -u root -l 192.168.0.200 -p 12000 -c 256 -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，

2.如果要结束Memcache进程，执行：

# kill `cat /tmp/memcached.pid`

也可以启动多个守护进程，不过端口不能重复。

 

使Memcache作为服务启动

1、创建 /etc/init.d/memcached  内容如下

#!/bin/bash # # memcached This shell script takes care of starting and stopping # the MemcacheD service (memcached). # # chkconfig: - 60 30 # description: MemcacheD server. # processname: memcached # pidfile: /var/run/memcached/memcached.pid # Source function library. . /etc/rc.d/init.d/functions prog=/usr/local/bin/memcached username=memcached # Avoid running as root memory_max=128 # Default 64 MB port=11211 # Change this, memcached has no security # Values based on CentOS 5.x PID=/var/run/memcached/memcached.pid LOCK=/var/lock/subsys/memcached start(){ $prog -d -u $username -m $memory_max -P $PID /dev/null 2&1 & ret=$? if [ $ret -eq 0 ] && touch $LOCK; then action $"Starting $prog: " /bin/true else ret=1 action $"Startng $prog: " /bin/false fi return $ret } stop(){ MEMCACHEDPID=$(cat "$PID" 2/dev/null) if [ -n "$MEMCACHEDPID" ]; then /bin/kill "$MEMCACHEDPID" /dev/null 2&1 ret=$? if [ $ret -eq 0 ]; then STOPTIMEOUT=60 while [ $STOPTIMEOUT -gt 0 ]; do /bin/kill -0 "$MEMCACHEDPID" /dev/null 2&1 || break sleep 1 let STOPTIMEOUT=${STOPTIMEOUT}-1 done if [ $STOPTIMEOUT -eq 0 ]; then echo "Timeout error occurred trying to stop MemcacheD Daemon." ret=1 action $"Stopping $prog: " /bin/false else rm -f $LOCK action $"Stopping $prog: " /bin/true fi else action $"Stopping $prog: " /bin/false fi else ret=1 action $"Stopping $prog: " /bin/false fi return $ret } restart(){ start stop } # See how we were called. case "$1" in start) start ;; stop) stop ;; status) status memcached ;; restart) restart ;; *) echo $"Usage: $0 {start|stop|status|restart}" exit 1 esac exit $?

2、创建用户

/usr/sbin/adduser -M memcached -s /sbin/nologin -u 10000 mkdir /var/run/memcached/ && chown memcached:memcached /var/run/memcached/

3、建立服务

/sbin/chkconfig --level 345 memcached on /sbin/service memcached start

4、检查

[root@dev src]$ /sbin/service memcached status memcached (pid 9516) is running... [root@dev src]$ /usr/sbin/lsof -ai 4 -p 9516 COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME memcached 9516 memcached 7u IPv4 209971 TCP *:11211 (LISTEN) memcached 9516 memcached 9u IPv4 209976 UDP *:11211