Memcached安装设置

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What is Memcached? 网址：http://www.memcached.org/

安装依赖：

memcached依赖libevent，需要先安装libevent包：
yum install libevent-devel

下载安装：
wget http://www.memcached.org/files/memcached-1.4.21.tar.gz
tar -zxvf memcached-1.4.21.tar.gz
cd memcached-1.4.21/

./configure
make
make install

安装完之后memcached路径在/usr/local/bin/memcached

启动memcached服务:

/usr/local/bin/memcached -d -m 100 -u root -l 192.168.5.177 -p 11211 -c 256 -P /tmp/memcached.pid

参数说明：
-d 启动一个守护进程，
-m 分配给Memcache使用的内存大小，单位是MB
-u 运行Memcache的用户
-l 监听的服务器IP地址，可以有多个地址的话
-p 设置Memcache监听的端口
-c 最大运行的并发连接数，默认是1024，根据服务器的负载量来设定
-P 设置保存Memcache的pid文件

停止memcached服务：

kill `cat /tmp/memcached.pid`

也可以写个脚本来启动停止memcached：

#!/bin/shWORK_DIR="/opt/cache"MEMCACHE="/usr/local/bin/memcached"RUNNING_USER="root"MEMORY=100IP_ADDRESS="192.168.0.10"PORT=11211MAX_CONNECTION=256PID="$WORK_DIR/memcached.pid"OPTS="-d -m $MEMORY -u $RUNNING_USER -l $IP_ADDRESS -p $PORT -c $MAX_CONNECTION -P $PID"psid=0checkpid() {      if [ -f "$PID" ];  then      psid=`cat "$PID"`   else      psid=0   fi}start() {   checkpid   if [ $psid -ne 0 ]; then      echo "================================"      echo "warn: memcache already started! (pid=$psid)"      echo "================================"   else      echo -n "Starting Memcache ..."      CMD="$MEMCACHE $OPTS"      su - $RUNNING_USER -c "$CMD"      sleep 1      checkpid      if [ $psid -ne 0 ]; then         echo "(pid=$psid) [OK]memcache start on $PORT"      else         echo "[Failed]"      fi   fi}stop() {   checkpid   if [ $psid -ne 0 ]; then      echo -n "Stopping Memcache ...(pid=$psid) "      kill -9 $psid      sleep 1      if [ $? -eq 0 ]; then rm -f "$PID"         echo "[OK]"      else         echo "[Failed]"      fi      checkpid      if [ $psid -ne 0 ]; then         stop      fi   else      echo "================================"      echo "warn: memcache is not running"      echo "================================"   fi}status() {   checkpid   if [ $psid -ne 0 ];  then      echo "memcache is running! (pid=$psid)"   else      echo "memcache is not running"   fi}info() {   echo "System Information:"   echo "WORK_DIR:$WORK_DIR"   echo "MEMCACHE:$MEMCACHE"   echo "OPTS:$OPTS"}case "$1" in   'start')      start      ;;   'stop')     stop     ;;   'restart')     stop     start     ;;   'status')     status     ;;   'info')     info     ;;  *)     echo "Usage: $0 {start|stop|restart|status|info}"     exit 1esacexit 0

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