linux下安装memcache

1.下载

http://www.monkey.org/~provos/libevent-2.0.12-stable.tar.gz

http://memcached.googlecode.com/files/memcached-1.4.5.tar.gz

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2.安装

安装libevent

tar xvf libevent-2.0.12-stable.tar.gz

cd libevent-2.0.12-stable

./configure -prefix=/usr

make

make install

查看安装是否成功

ls -all /usr/lib | grep libevent

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安装memcached

tar xvf memcached-1.4.5.tar.gz

cd memcached-1.4.5

./configure -with-libevent=/usr

make

make install

查看安装是否成功

ls -all/usr/local/bin/mem*

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3.开防火墙,假设使用端口11211

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vi /etc/sysconfig/iptables

添加

-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 11211 -j ACCEPT

保存退出

重启服务使刚才的设置生效

service iptables restart

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搞定

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启动memcached

/usr/local/bin/memcached -d -m 128 -u root -l 192.168.49.130 -p 11211 -c 1024?-P /tmp/memcached.pid

参数说明

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-d 启动一个守护进程

-m 分配给Memcache使用的内存数量(MB)

-u 运行Memcache的用户

-l 是监听的服务器IP地址

-p Memcache监听的端口

-c 最大运行的并发连接数,默认是1024

-P 设置保存Memcache的pid文件

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关闭memcached

1.查询memcached的pid

cat /tmp/memcached.pid

显示22376

如果没指定-P参数,则先ps -A查看进程,找出memcached的pid,例如我这里显示的是

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22182 ? ? ? ? ?00:00:00 memcached

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2.kill pid

例如kill?22182

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将memcached加入启动项

vi /etc/rc.d/rc.local

在最后加入启动命令

/usr/local/bin/memcached -d -m 128 -u root -l 192.168.49.130 -p 11211 -c 1024?-P /tmp/memcached.pid

保存退出

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添加到服务

vim /etc/rc.d/rc.local

添加

/usr/local/bin/memcached -d -m 128 -u root -l 192.168.49.130 -p 11211 -c 1024?-P /tmp/memcached.pid

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测试

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package com.gary.test;

import com.danga.MemCached.MemCachedClient;
import com.danga.MemCached.SockIOPool;

public class TestMemcached {

	String[] servers = { "192.168.49.130:11211" };
	Integer[] weights = { 3 };
	
	MemCachedClient mcc = new MemCachedClient();
	SockIOPool pool = SockIOPool.getInstance();

	public TestMemcached() {
		init();
	}
	
	private void init(){
		pool.setServers(servers);
		pool.setWeights(weights);

		pool.setInitConn(5);
		pool.setMinConn(5);
		pool.setMaxConn(250);
		pool.setMaxIdle(30);

		pool.setMaintSleep(30);
		pool.initialize();
	}

	public void testPut() {
		for (int i = 1; i <= 3; i++) {
			// 如果以前存在，则不去更新
			boolean b = mcc.add("key" + i, "value" + i); 
			System.out.println("key" + i +" - result: " + b);
		}
	}

	public void testReplace() {
		// 如果key不存在，则返回flase，更新失败
		boolean b = mcc.replace("key2", "newValue");
		System.out.println("update " + b);
	}

	public void testGet() {
		Object obj = mcc.get("key2");
		System.out.println(obj);
	}
	
	public void testDelete() {
		Object key3 = mcc.get("key3");
		System.out.println("key3:" + key3);
		mcc.delete("key3");
		System.out.println("after delete");
		Object key3now = mcc.get("key3");
		System.out.println("key3 now:" + key3now);
	}
	
	
	public static void main(String args[]) {
		TestMemcached tm = new TestMemcached();
		tm.testPut();
		tm.testReplace();
		tm.testGet();
		tm.testDelete();
		//最后关闭池
		tm.pool.shutDown();
	}
}

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?测试结果

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key1 - result: true
key2 - result: true
key3 - result: true
update true
newValue
key3:value3
after delete
key3 now:null

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