CentOS下安裝生產環境可用的Memcached 頂 原

(WJW)安裝Memcached

[1] yum安裝(也可以源碼安裝,在"make依賴庫"目錄下):

yum install automake autoconf libtool

[2] 安裝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] 安裝memcached

注意: 安裝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,還要把replication.c裏的:
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的時候報錯

memcached.c: 在函數'add_iov'中:
memcached.c:696:30: 錯誤: 'IOV_MAX'未聲明(在此函數內第一次使用)
memcached.c:696:30: 附註: 每個未聲明的標識符在其出現的函數內只報告一次
make[2]: *** [memcached-memcached.o] 錯誤 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: 如果運行/usr/local/bin/memcached -h的時候報錯:找不到libevent**
執行: ln -s /usr/local/lib/libevent-1.4.so.2 /usr/lib64/libevent-1.4.so.2
技巧: 執行ldd /usr/local/bin/memcached,看缺少那些庫!

[4] 終端調試運行:

執行: /usr/local/bin/memcached -m 100 -u root -p 11411
也可以啓動多個守護進程,但是端口不能重複
啓動參數說明:

-d 選項是啓動一個守護進程,
-m 是分配給Memcache使用的內存數量,單位是MB,默認64MB
-M return error on memory exhausted (rather than removing items)
-u 是運行Memcache的用戶,如果當前爲root 的話,需要使用此參數指定用戶.
-l 是監聽的服務器IP地址,默認爲所有網卡.
-p 是設置Memcache的TCP監聽的端口,最好是1024以上的端口
-c 選項是最大運行的併發連接數,默認是1024
-P 是設置保存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] 附錄:

memcached啓動停止腳本:/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

添加可執行: chmod +x /etc/rc.d/init.d/memcached