memcached 内存缓存服务器
memcached 内存缓存服务器hash一致算法
【确保sasl-devel安装包已经安装，可以使用ssl认证】
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yum -y installcyrus-sasl-devel
【编译安装 libevent 事件驱动】
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http://libevent.org/ 下载 libevent-2.0.20-stable.tar.gz
./configure --prefix=/usr/local/libevent
make && make install
make: Entering directory`/home/libevent-2.0.20-stable/test'
make: Entering directory`/home/libevent-2.0.20-stable/test'
make: Nothing to be donefor `install-exec-am'.
make: Nothing to be donefor `install-data-am'.
make: Leaving directory`/home/libevent-2.0.20-stable/test'
make: Leaving directory`/home/libevent-2.0.20-stable/test'
make: Leaving directory`/home/libevent-2.0.20-stable/test'
make: Leaving directory `/home/libevent-2.0.20-stable'
安装结束
【memcached-1.4.24.tar.gz】
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./configure --enable-sasl --prefix=/usr/local/memcached--with-libevent=/usr/local/libevent/ 这是一行
config.status: creatingMakefile
config.status: creatingdoc/Makefile
config.status: creating config.h
config.status: executingdepfiles commands
检查通过
make && make install
make: Leaving directory`/home/memcached-1.4.24'
make: Leaving directory`/home/memcached-1.4.24'
make: Leaving directory`/home/memcached-1.4.24'
编译安装完成
【看看帮助】
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/usr/local/memcached/bin/memcached-h
默认端口tcp udp 11211
-M return error on memory exhausted(rather than removing items)
指定为128M 最小20字节增长因子1—2之间详细 nobody身份运行
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/usr/local/memcached/bin/memcached-m 128 -n 20 -f 1.15 -vv -u nobody
slab class 1: chunk size 72 perslab 14563空闲空间
【后台运行】
/usr/local/memcached/bin/memcached-m 128 -n 20 -f 1.15 -vv -u nobody -d
【看端口监听】
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netstat-tunlp
# netstat-tnulp | grep "11211"
tcp 0 0 0.0.0.0:11211 0.0.0.0:* LISTEN 10743/memcached
tcp 0 0 :::11211 :::* LISTEN 10743/memcached
udp 0 0 0.0.0.0:11211 0.0.0.0:* 10743/memcached
udp 0 0 :::11211 :::* 10743/memcached
成功开启
【安装telnet】yum -y install telnet
【测试连接11211】telnet localhost 11211
查看状态 statsadd mykey 0 30 5 添加键mykey flags为0 超时30秒 5个字符，回车输入5个字符get mykey 看看mykey里面是什么get mykey 30秒后再来看<36 get mykey>36 END30秒后不再返回给你，但并不清理【杀掉所有memcached进程】killall memcached
【看看还有没有】netstat –tunlp
【写一个服务脚本】
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memcachedSysV的startup脚本代码如下所示，将其建立为/etc/init.d/memcached文件：
#!/bin/bash
#
# Init file for memcached
#
# chkconfig: - 86 14
# description: Distributed memory caching daemon
#
# processname: memcached
# config: /etc/sysconfig/memcached
. /etc/rc.d/init.d/functions
## Default variables
PORT="11211"
USER="nobody"
MAXCONN="1024"
CACHESIZE="64"
OPTIONS=""
[ -f /etc/sysconfig/memcached ] && ./etc/sysconfig/memcachedRETVAL=0
prog="/usr/local/memcached/bin/memcached"
desc="Distributed memory caching"
lockfile="/var/lock/subsys/memcached"
start() {
echo -n $"Starting $desc(memcached): "
daemon $prog -d -p $PORT -u$USER -c $MAXCONN -m $CACHESIZE$OPTIONS
RETVAL=$?
echo
[ $RETVAL -eq 0 ] &&touch $lockfile
return $RETVAL
}
stop() {
echo -n $"Shutting down$desc (memcached): "
killproc $prog
RETVAL=$?
echo
[ $RETVAL -eq 0 ] &&rm -f $lockfile
return $RETVAL
}
restart() {
stop
start
}
reload() {
echo -n $"Reloading$desc ($prog): "
killproc $prog -HUP
RETVAL=$?
echo
return $RETVAL
}
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
restart
;;
condrestart)
[ -e $lockfile ] &&restart
RETVAL=$?
;;
reload)
reload
;;
status)
status $prog
RETVAL=$?
;;
*)
echo $"Usage: $0{start|stop|restart|condrestart|status}"
RETVAL=1
esac
exit $RETVAL
【给他权限】chmod +x/etc/init.d/memcached【开启服务】servicememcached restart【开启是否成功】netstat -tunlp创建给脚本传参数的文件
vim /etc/sysconfig/memcachedORT="11211"USER="nobody"MAXCONN="1024"CACHESIZE="128"OPTIONS=""【测试当前连接11211】telnet localhost 11211
查看状态 statslimit_maxbytes 67108864就是当前的64Mvim /etc/sysconfig/memcached改CACHESIZE="128"service memcached restarttelnet localhost 11211STAT limit_maxbytes134217728 就是改好的128M
OK！配置已生效
【memcached的客户端】
vim fastcgi_params看看配置好了吗启动nginx service nginxrestartvim nginx.conf改一改
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server {
listen 80;
server_namelocalhost;
#charset koi8-r;
#access_loglogs/host.access.logmain;
location / {
root /web/htdocs;
index index.php index.html;
# proxy_pass http://172.16.0.104/;
# if ($request_method = "PUT") {
# proxy_pass http://172.16.0.105;
# }
}
启用php，改好路径 /web/htdocs;
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location ~ \.php$ {
index index.php index.html;
root /web/htdocs;
fastcgi_pass 127.0.0.1:9000;
fastcgi_indexindex.php;
fastcgi_paramSCRIPT_FILENAME/scripts$fastcgi_script_name;
include fastcgi_params;
}
测试 首页vim /web/htdocs/index.php【访问测试http://172.16.0.102/】
【安装memcache-2.2.7.tgz 客户端】不是memcached
【执行】/usr/local/php/bin/phpize
cd memcache-2.2.7【检查】./configure --with-php-config=/usr/local/php/bin/php-config--enable-memcache
config.status: creatingconfig.h 检查Ok【编译并安装】make && make install
关键的路径：/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/
[root@localhostmemcache-2.2.7]# mkdir /etc/php.d/
[root@localhostmemcache-2.2.7]# vim /etc/php.d/memcache.ini
mkdir/etc/php.d
vim/etc/php.d/memcache.ini
extension=/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/memcache.so
servicephp-fpm restart
【访问测试http://172.16.0.102/】
【继续测试】
vim/web/htdocs/test.php
<?php$mem = new Memcache;$mem->connect("127.0.0.1", 11211)or die("Could not connect");
$version = $mem->getVersion();echo "Server's version: ".$version."<br/>\n";
$mem->set('testkey', 'Hello World', 0, 600) or die("Failed tosave data at the memcached server");echo "Store data in the cache (data will expire in 600seconds)<br/>\n";
$get_result = $mem->get('testkey');echo "$get_result is from memcached server."; ?>
【访问测试】http://172.16.0.102/test.php
会显示
Server's version: 1.4.24
Store data in the cache (data will expire in 600 seconds)
Hello World is from memcached server.【telnet测试】
#telnet localhost 11211Trying ::1...Connected to localhost.Escape character is '^]'.get testkeyVALUE testkey 0 11Hello WorldENDquit存储成功！
【配置php将会话保存至memcached中】比php保存在本机硬盘上快很多
编辑php.ini文件，确保如下两个参数的值分别如下所示：session.save_handler =memcachesession.save_path= "tcp://172.16.0.102:11211?persistent=1&weight=1&timeout=1&retry_interval=15"注意改为本机IP这是什么 session.name = PHPSESSID
cd /web/htdocs/
新建php页面setsess.php，为客户端设置启用session：<?phpsession_start();if(!isset($_SESSION['www.MageEdu.com'])) {$_SESSION['www.MageEdu.com'] = time();}print$_SESSION['www.MageEdu.com'];print"<br><br>";print"Session ID: " . session_id();?>
新建php页面showsess.php，获取当前用户的会话ID：<?phpsession_start();$memcache_obj =new Memcache;$memcache_obj->connect('172.16.200.11',11211);$mysess=session_id();var_dump($memcache_obj->get($mysess));$memcache_obj->close();?>【测试】http://172.16.0.102/setsess.phpphphttp://172.16.0.102/showsess.php【memadmin-master.zip】
解压unzip memadmin-master.zip
mvmemadmin-master /web/htdocs/memaster
vim/web/htdocs/memaster/config.php 可以修改配置文件
浏览器访问 http://172.16.0.102/memaster/
默认帐号 admin
默认密码 admin
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