memcached 的总结

1、memcached在Linux下安装

    首先安装libevent

    #tar -zxvf libevent-2.0.12-stable.tar.gz

    #cd /libevent

    #./configuer --prefix=/usr/local/libevent

    #make

    #make install

     然后安装memcached

    #tar -zxvf memcached-1.4.14.tar.gz

    #cd memcached

    #./configure --with-libevent=/usr/local/libevent

    #make

    #make install

2、启动memcached

    #/usr/local/bin/memcached -d -m 1024 -l 127.0.0.1 -p 20001 -u root -c 1024 -p 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

3、连接memcached服务器

    #telnet 127.0.0.1 20001

    #set key1 0 60 4

     zhou

    #get key1

    #add userId 0 0 5

    zhou

    #replace userId 0 0 5

    wu

    #delete wu

    #gets userId

    #cas userId 0 0 5 6

    wang

    #stats

    #flush_all

    #quit

4、memcached自启动脚本

    

1. #!/bin/sh   
   #   
   # memcached:    MemCached Daemon   
   #   
   # chkconfig:    - 90 25    
   # description:  MemCached Daemon   
   #   
   # Source function library.   
   . /etc/rc.d/init.d/functions   
   . /etc/sysconfig/network   
       
   start()    
   {   
           echo -n $"Starting memcached: "  
           daemon /usr/local/src/memcached-1.4.14/memcached -u daemon -d -m 1024 -l 127.0.0.1 -p 58728  
           echo   
   }   
       
   stop()    
   {   
           echo -n $"Shutting down memcached: "  
           killproc memcached    
           echo   
   }   
       
   [ -f /usr/local/src/memcached-1.4.14/memcached ] || exit 0  
       
   # See how we were called.   
   case "$1" in   
     start)   
           start   
           ;;   
     stop)   
           stop   
           ;;   
     restart|reload)   
           stop   
           start   
           ;;   
     condrestart)   
           stop   
           start   
           ;;   
     *)   
           echo $"Usage: $0 {start|stop|restart|reload|condrestart}"  
           exit 1  
   esac   
   exit 0  
   来源： <http://www.cnblogs.com/technet/archive/2011/09/11/2173485.html>
    

   
   
    
   

        新建/etc/init.d/memcached文件

        #chmod u+x memcached
        #chkconfig --add memcached

       #chkconfig --level 235 memcached on

       #service memcached start/stop/restart

       #/etc/init.d/memcached start/stop/restart

5、Java客户端Xmemcached与spring集成

      Xmemcached在多线程下效果更好。

      spring配置文件如下：

      

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="
    http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
<bean id="xmemcachedDao" class="com.iqiyi.itv.terminal4.memcache.dao.XMemcachedDao">
        <property name="memCachedClientList">
            <list>
                <ref bean="memcachedClient1" />
            </list>
        </property>
    </bean>
    <bean name="memcachedClientBuilder1" class="net.rubyeye.xmemcached.XMemcachedClientBuilder">
        <constructor-arg>
            <list>
                <bean class="java.net.InetSocketAddress">
                    <constructor-arg>
                        <value>192.168.58.130</value>  <!--虚拟机IP-->
                    </constructor-arg>
                    <constructor-arg>
                        <value>20001</value>
                    </constructor-arg>
                </bean>
            </list>
        </constructor-arg>
        <constructor-arg>
            <list>
                <value>1</value>
            </list>
        </constructor-arg>
        <property name="connectionPoolSize" value="8"></property>
        <property name="sessionLocator">
            <bean class="net.rubyeye.xmemcached.impl.KetamaMemcachedSessionLocator"></bean>
        </property>
        <property name="transcoder">
            <bean class="net.rubyeye.xmemcached.transcoders.SerializingTranscoder">
                <property name="compressionThreshold" value="1048576"></property>
            </bean>
        </property>
        <property name="bufferAllocator">
            <bean class="net.rubyeye.xmemcached.buffer.SimpleBufferAllocator"></bean>
        </property>
    </bean>
    <bean name="memcachedClient1" factory-bean="memcachedClientBuilder1"
        factory-method="build" destroy-method="shutdown">
        <property name="opTimeout" value="30000"></property>
    </bean>
<beans>

    获取到memcachedClient就可以进行add、set、delete、replace等操作。