CentOS下安装生产环境可用的Memcached
(WJW)安装Memcached
[1] yum安装(也可以源码安装,在"make依赖库"目录下):
yum install automake autoconf libtool[2] 安装libevent
tar -zxvf libevent-1.4.13-stable.tar.gz
cd libevent-1.4.13-stable
./configure --prefix=/usr/local
make uninstall
make clean
make
make install
cd ..[3] 安装memcached
注意: 安装Memcached前flush_all的修改
查找:memcached.c文件,把
} else if (ntokens >= 2 && ntokens <= 4 && (strcmp(tokens[COMMAND_TOKEN].value, "flush_all") == 0)) {
修改成:
} else if (ntokens >= 2 && ntokens <= 4 && (strcmp(tokens[COMMAND_TOKEN].value, "xflush_all") == 0)) {
如果是Memcached-Repcached版本,还要把replication.c里的:
char *s = "flush_all ";
修改成:
char *s = "xflush_all ";
tar zxvf ./memcached-1.4.22.tar.gz
cd ./memcached-1.4.22
./configure --with-libevent=/usr/local/lib/ --enable-64bit
make uninstall
make clean
make
make install
cd ..注意: 如果make的时候报错
memcached.c: 在函数'add_iov'中: memcached.c:696:30: 错误: 'IOV_MAX'未声明(在此函数内第一次使用) memcached.c:696:30: 附注: 每个未声明的标识符在其出现的函数内只报告一次 make[2]: *** [memcached-memcached.o] 错误 1
需要修改memcached.c文件:
/* FreeBSD 4.x doesn't have IOV_MAX exposed. */
#ifndef IOV_MAX
#if defined(__FreeBSD__) || defined(__APPLE__)
# define IOV_MAX 1024
#endif
#endif改成:
/* FreeBSD 4.x doesn't have IOV_MAX exposed. */
#ifndef IOV_MAX
# define IOV_MAX 1024
#endif注意: 如果运行/usr/local/bin/memcached -h的时候报错:找不到libevent**
执行: ln -s /usr/local/lib/libevent-1.4.so.2 /usr/lib64/libevent-1.4.so.2
技巧: 执行ldd /usr/local/bin/memcached,看缺少那些库!
[4] 终端调试运行:
执行: /usr/local/bin/memcached -m 100 -u root -p 11411
也可以启动多个守护进程,但是端口不能重复
启动参数说明:
-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,默认64MB -M return error on memory exhausted (rather than removing items) -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. -l 是监听的服务器IP地址,默认为所有网卡. -p 是设置Memcache的TCP监听的端口,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 -P 是设置保存Memcache的pid文件 -f chunk size growth factor (default: 1.25) -I Override the size of each slab page. Adjusts max item size(1.4.2版本新增)
[X] 附录:
memcached启动停止脚本:/etc/rc.d/init.d/memcached(注意:文件格式一定要是unix的)
vi /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: "
daemon $MEMCACHED -u daemon -d -m 100 -p 11411 -P ${PID_FILE}
echo
}
stop() {
echo -n $"Shutting down memcached: "
killproc -p ${PID_FILE} memcached
echo
}
MEMCACHED="/usr/local/bin/memcached"
PID_FILE="/tmp/memcached_repcached.pid"
[ -f $MEMCACHED ] || exit 1
# See how we were called.
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
stop
sleep 3
start
;;
status)
status -p ${PID_FILE} memcached
;;
*)
echo $"Usage: $0 {start|stop|restart|status}"
exit 1
esac
exit 0添加可执行: chmod +x /etc/rc.d/init.d/memcached