Memcached 学习笔记（一）安装 & helloworld
2012-03-27 15:54
435 查看
Memcached 学习笔记（一）安装 & helloworld
1. 安装Memcached
首先是下载 memcached 了，目前最新版本是 1.1.12，直接从官方网站即可下载到memcached-1.1.12.tar.gz。除此之外，memcached 用到了
libevent，我下载的是 libevent-1.1a.tar.gz。
接下来是分别将 libevent-1.1a.tar.gz 和 memcached-1.1.12.tar.gz 解开包、编译、安装：
# tar -xzf libevent-1.1a.tar.gz # cd libevent-1.1a # ./configure -prefix=/usr # make # make install # cd .. # tar -xzf memcached-1.1.12.tar.gz # cd memcached-1.1.12 # ./configure -prefix=/usr # make # make install
安装完成之后，memcached 应该在 /usr/bin/memcached。
然后启动memcached：
./memcached -d -m 128 -u root -p 11211 -c 256
-p 监听的端口
-l 连接的IP地址, 默认是本机
-d start 启动memcached服务
-d restart 重起memcached服务
-d stop|shutdown 关闭正在运行的memcached服务
-d install 安装memcached服务
-d uninstall 卸载memcached服务
-u 以的身份运行 (仅在以root运行的时候有效)
-m 最大内存使用，单位MB。默认64MB
-M 内存耗尽时返回错误，而不是删除项
-c 最大同时连接数，默认是1024
-f 块大小增长因子，默认是1.25
-n 最小分配空间，key+value+flags默认是48
-h 显示帮助
然后使用下列命令来查看是否启动成功：
ps aux | grep memcached
2. 测试
首先下载memcache的jar包，导入工程中，然后运行如下代码：import java.util.Date;
import com.danga.MemCached.MemCachedClient;
import com.danga.MemCached.SockIOPool;
public class Main {
// 创建全局的唯一实例
protected static MemCachedClient mcc = new MemCachedClient();
protected static Main memCached = new Main();
// 设置与缓存服务器的连接池
static {
// 服务器列表和其权重
String[] servers = { "192.168.159.128:11211" };
Integer[] weights = { 3 };
// 获取socke连接池的实例对象
SockIOPool pool = SockIOPool.getInstance();
// 设置服务器信息
pool.setServers( servers );
pool.setWeights( weights );
// 设置初始连接数、最小和最大连接数以及最大处理时间
pool.setInitConn( 5 );
pool.setMinConn( 5 );
pool.setMaxConn( 250 );
pool.setMaxIdle( 1000 * 60 * 60 * 6 );
// 设置主线程的睡眠时间
pool.setMaintSleep( 30 );
// 设置TCP的参数，连接超时等
pool.setNagle( false );
pool.setSocketTO( 3000 );
pool.setSocketConnectTO( 0 );
// 初始化连接池
pool.initialize();
// 压缩设置，超过指定大小（单位为K）的数据都会被压缩
mcc.setCompressEnable( true );
mcc.setCompressThreshold( 64 * 1024 );
}
/**
* 保护型构造方法，不允许实例化！
*
*/
protected Main()
{
}
/**
* 获取唯一实例.
* @return
*/
public static Main getInstance()
{
return memCached;
}
/**
* 添加一个指定的值到缓存中.
* @param key
* @param value
* @return
*/
public boolean add(String key, Object value)
{
return mcc.add(key, value);
}
public boolean add(String key, Object value, Date expiry)
{
return mcc.add(key, value, expiry);
}
public boolean replace(String key, Object value)
{
return mcc.replace(key, value);
}
public boolean replace(String key, Object value, Date expiry)
{
return mcc.replace(key, value, expiry);
}
/**
* 根据指定的关键字获取对象.
* @param key
* @return
*/
public Object get(String key)
{
return mcc.get(key);
}
public static void main(String[] args)
{
Main cache = Main.getInstance();
cache.add( "hello" , 234 );
System.out.print( "get value : " + cache.get("hello"));
}
}console端打印如下：
[DEBUG] [2012-03-27 15:56:10] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = initialize | Line = 617 ] | [++++ initializing pool with following settings:] | [DEBUG] [2012-03-27 15:56:10] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = initialize | Line = 618 ] | [++++ initial size: 5] | [DEBUG] [2012-03-27 15:56:10] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = initialize | Line = 619 ] | [++++ min spare : 5] | [DEBUG] [2012-03-27 15:56:10] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = initialize | Line = 620 ] | [++++ max spare : 250] | [DEBUG] [2012-03-27 15:56:10] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = populateBuckets | Line = 647 ] | [++++ initializing internal hashing structure for consistent hashing] | [DEBUG] [2012-03-27 15:56:10] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = populateBuckets | Line = 657 ] | [++++ added 192.168.159.128:11211 to server bucket] | [DEBUG] [2012-03-27 15:56:10] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = populateBuckets | Line = 657 ] | [++++ added 192.168.159.128:11211 to server bucket] | [DEBUG] [2012-03-27 15:56:10] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = populateBuckets | Line = 657 ] | [++++ added 192.168.159.128:11211 to server bucket] | [DEBUG] [2012-03-27 15:56:10] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = populateBuckets | Line = 668 ] | [+++ creating initial connections (5) for host: 192.168.159.128:11211] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = createSocket | Line = 818 ] | [++++ created socket (Socket[addr=/192.168.159.128,port=11211,localport=4160]) for host: 192.168.159.128:11211] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = populateBuckets | Line = 679 ] | [++++ created and added socket: Socket[addr=/192.168.159.128,port=11211,localport=4160] for host 192.168.159.128:11211] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = createSocket | Line = 818 ] | [++++ created socket (Socket[addr=/192.168.159.128,port=11211,localport=4161]) for host: 192.168.159.128:11211] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = populateBuckets | Line = 679 ] | [++++ created and added socket: Socket[addr=/192.168.159.128,port=11211,localport=4161] for host 192.168.159.128:11211] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = createSocket | Line = 818 ] | [++++ created socket (Socket[addr=/192.168.159.128,port=11211,localport=4162]) for host: 192.168.159.128:11211] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = populateBuckets | Line = 679 ] | [++++ created and added socket: Socket[addr=/192.168.159.128,port=11211,localport=4162] for host 192.168.159.128:11211] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = createSocket | Line = 818 ] | [++++ created socket (Socket[addr=/192.168.159.128,port=11211,localport=4163]) for host: 192.168.159.128:11211] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = populateBuckets | Line = 679 ] | [++++ created and added socket: Socket[addr=/192.168.159.128,port=11211,localport=4163] for host 192.168.159.128:11211] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = createSocket | Line = 818 ] | [++++ created socket (Socket[addr=/192.168.159.128,port=11211,localport=4164]) for host: 192.168.159.128:11211] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = populateBuckets | Line = 679 ] | [++++ created and added socket: Socket[addr=/192.168.159.128,port=11211,localport=4164] for host 192.168.159.128:11211] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = getSock | Line = 879 ] | [cache socket pick hello null] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = getConnection | Line = 1027 ] | [++++ moving socket for host (192.168.159.128:11211) to busy pool ... socket: Socket[addr=/192.168.159.128,port=11211,localport=4164]] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = getSock | Line = 935 ] | [cache choose 192.168.159.128:11211 for hello] | [INFO] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.MemCachedClient | Method = set | Line = 740 ] | [Storing with native handler...] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = selfMaint | Line = 1294 ] | [++++ Starting self maintenance....] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = selfMaint | Line = 1308 ] | [++++ Size of avail pool for host (192.168.159.128:11211) = 4] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = selfMaint | Line = 1327 ] | [++++ Need to create 1 new sockets for pool for host: 192.168.159.128:11211] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = createSocket | Line = 818 ] | [++++ created socket (Socket[addr=/192.168.159.128,port=11211,localport=4165]) for host: 192.168.159.128:11211] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = selfMaint | Line = 1357 ] | [++++ Size of avail pool for host (192.168.159.128:11211) = 5] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = selfMaint | Line = 1401 ] | [++++ Size of busy pool for host (192.168.159.128:11211) = 1] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = selfMaint | Line = 1443 ] | [+++ ending self maintenance.] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = selfMaint | Line = 1294 ] | [++++ Starting self maintenance....] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = selfMaint | Line = 1308 ] | [++++ Size of avail pool for host (192.168.159.128:11211) = 5] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = selfMaint | Line = 1357 ] | [++++ Size of avail pool for host (192.168.159.128:11211) = 5] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = selfMaint | Line = 1401 ] | [++++ Size of busy pool for host (192.168.159.128:11211) = 1] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = selfMaint | Line = 1443 ] | [+++ ending self maintenance.] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = selfMaint | Line = 1294 ] | [++++ Starting self maintenance....] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = selfMaint | Line = 1308 ] | [++++ Size of avail pool for host (192.168.159.128:11211) = 5] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = selfMaint | Line = 1357 ] | [++++ Size of avail pool for host (192.168.159.128:11211) = 5] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = selfMaint | Line = 1401 ] | [++++ Size of busy pool for host (192.168.159.128:11211) = 1] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = selfMaint | Line = 1443 ] | [+++ ending self maintenance.] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = selfMaint | Line = 1294 ] | [++++ Starting self maintenance....] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = selfMaint | Line = 1308 ] | [++++ Size of avail pool for host (192.168.159.128:11211) = 5] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = selfMaint | Line = 1357 ] | [++++ Size of avail pool for host (192.168.159.128:11211) = 5] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = selfMaint | Line = 1401 ] | [++++ Size of busy pool for host (192.168.159.128:11211) = 1] | [DEBUG] [2012-03-27 15:56:11] [Thread = MaintThread | Class = com.danga.MemCached.SockIOPool | Method = selfMaint | Line = 1443 ] | [+++ ending self maintenance.] | [INFO] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.MemCachedClient | Method = set | Line = 824 ] | [++++ memcache cmd (result code): add hello 4 0 4 (STORED)] | [INFO] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.MemCachedClient | Method = set | Line = 827 ] | [++++ data successfully stored for key: hello] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool$SockIO | Method = close | Line = 1714 ] | [++++ marking socket (Socket[addr=/192.168.159.128,port=11211,localport=4164]) as closed and available to return to avail pool] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = checkIn | Line = 1151 ] | [++++ calling check-in on socket: Socket[addr=/192.168.159.128,port=11211,localport=4164] for host: 192.168.159.128:11211] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = checkIn | Line = 1156 ] | [++++ removing socket (Socket[addr=/192.168.159.128,port=11211,localport=4164]) from busy pool for host: 192.168.159.128:11211] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = checkIn | Line = 1162 ] | [++++ returning socket (Socket[addr=/192.168.159.128,port=11211,localport=4164] to avail pool for host: 192.168.159.128:11211] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = getSock | Line = 879 ] | [cache socket pick hello null] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = getConnection | Line = 1027 ] | [++++ moving socket for host (192.168.159.128:11211) to busy pool ... socket: Socket[addr=/192.168.159.128,port=11211,localport=4164]] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = getSock | Line = 935 ] | [cache choose 192.168.159.128:11211 for hello] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.MemCachedClient | Method = get | Line = 1276 ] | [++++ memcache get command: get hello ] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.MemCachedClient | Method = get | Line = 1288 ] | [++++ line: VALUE hello 4 4] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.MemCachedClient | Method = get | Line = 1296 ] | [++++ key: hello] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.MemCachedClient | Method = get | Line = 1297 ] | [++++ flags: 4] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.MemCachedClient | Method = get | Line = 1298 ] | [++++ length: 4] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.MemCachedClient | Method = get | Line = 1288 ] | [++++ line: END] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.MemCachedClient | Method = get | Line = 1380 ] | [++++ finished reading from cache server] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool$SockIO | Method = close | Line = 1714 ] | [++++ marking socket (Socket[addr=/192.168.159.128,port=11211,localport=4164]) as closed and available to return to avail pool] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = checkIn | Line = 1151 ] | [++++ calling check-in on socket: Socket[addr=/192.168.159.128,port=11211,localport=4164] for host: 192.168.159.128:11211] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = checkIn | Line = 1156 ] | [++++ removing socket (Socket[addr=/192.168.159.128,port=11211,localport=4164]) from busy pool for host: 192.168.159.128:11211] | [DEBUG] [2012-03-27 15:56:11] [Thread = main | Class = com.danga.MemCached.SockIOPool | Method = checkIn | Line = 1162 ] | [++++ returning socket (Socket[addr=/192.168.159.128,port=11211,localport=4164] to avail pool for host: 192.168.159.128:11211] | get value : 234
3.管理memcached
连上memcache，然后stats，详细如下：mqq@32_167_game:~> telnet server port
Trying 172.16.32.166...
Connected to 172.16.32.166.
Escape character is '^]'.
stats
这样就能显示memcached的信息，
指令格式： <命令> <键> <标记> <有效期> <数据长度>\r\n <命令> - command name
主要是三个储存数据的三个命令， set, add, replace
内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理 
相关文章推荐
- golang学习笔记(1)：安装&helloworld
- C++/GDI+ 学习笔记(一)——安装、配置&使用
- C++/GDI+ 学习笔记(一)——安装、配置&使用
- Memcached笔记——（一）安装&常规错误&监控
- 【Python学习笔记】pip安装失败的替代方法&解决方案
- Memcached （简介及安装）--学习笔记（一）
- 10020---Memcached笔记（1）安装&常规错误&监控
- C++/GDI+ 学习笔记(一)——安装、配置&使用
- memcached学习——大纲简介 && 安装(基于centos6.5)、启动、关闭memcached（一）
- memcached学习笔记1(windows 7 64bit 环境下安装memcached)
- Memcached笔记——（一）安装&常规错误&监控
- (转)memcached学习笔记1(windows 7 64bit 环境下安装memcached)
- eclipse & java 学习笔记（一）- 入门安装与尝鲜
- Memcached-学习（一）安装&常规错误&监控
- memcached高速缓存学习笔记001---memcached介绍和安装以及基本使用
- C++/GDI+ 学习笔记(一)——安装、配置&使用
- cocos2d-x学习笔记之cocos2d-x的安装与helloworld测试
- 丹的python学习笔记Day1python安装+我的helloworld
- Jenkins 学习笔记（1）：安装&配置
- Memcached笔记——（一）安装&常规错误&监控