Memcache集群环境下缓存解决方案
2017-08-16 13:27
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Memcache是一个高性能的分布式的内存对象缓存系统,通过在内存里维护一个统一的巨大的hash表,它能够用来存储各种格式的数据,包括图像、视频、文件以及数据库检索的结果等。简单的说就是将数据调用到内存中,然后从内存中读取,从而大大提高读取速度。
一、在Linux上安装memcached:
1. Linux上的memcache需要俩个安装包:libevent-1.4.12-stable.tar.gz 、memcached-1.4.3.tar.gz
解压安装:
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tar -zxf libevent-1.4.12-stable.tar.gz
tar -zxf memcached-1.4.3.tar.gz
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# cd libevent-1.4.12-stable
# ./configure --prefix=/usr/local/libevent
# make
# sudo make install
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# ls -al /usr/lib | grep libevent
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# cd ../ memcached-1.4.3
# ./configure --prefix=/usr/local/memcached --with-libevent=/usr/local/libevent
# make
# sudo make install
# /usr/local/memcached/bin/memcached -d -m 528 -u ligang -p12131
-m 启动内存 -u 启动用户 -p
端口
测试启动是否成功:
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telnet ip port
telnet 172.17.3.135 12135
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ps -aux |grep mem
2. 以管理员省份运行DOS窗口
3. memcached.exe -d install
4. memcached.exe -d start
5. 查看是否安装成功services.msc
设置memcached,启动该服务后,memcached服务默认占用的端口是11211,占用的最大内存默认是64M。如果需要修改这两个参数,比如修改端口为10000,内存为512,则输入:
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D:\memcached\memcached.exe -p 10000 -m 512 -d start
-m表示占用的最大内存(单位为M)。
上述命令无效,通过修改注册表实现
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HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\memcached Server
其中的ImagePath项的值为:"c:\memcached\memcached.exe" -d runservice
改成:"c:\memcached\memcached.exe" -p 15000 -d runservice
A. telnet到memcache服务器,如:telnet 127.0.0.1 11211(11211是memcache的默认端口)
进入上述环境后,下面命令可用:
B. stats 查看基本信息
C. stats items 查看items
D. get key(key 为 item后面的字符串即键)
E. -c 最大同时连接数,默认是1024
F. -f 块大小增长因子,默认是1.25
G. -n 最小分配空间,key+value+flags默认是48
H. -h 显示帮助
[java]
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package memcachedDemo;
import java.util.Date;
import com.danga.MemCached.MemCachedClient;
import com.danga.MemCached.SockIOPool;
public class Memcached {
private static MemCachedClient mcc = new MemCachedClient();
private static Memcached memcached = new Memcached();
//服务群组
private static final String[] services = {"127.0.0.1:11211"};
//服务器群各自对应的权重
private static final Integer[] weights = {1};
//初始化连接数
private static final Integer init_connection = 5;
//最小连接数
private static final Integer min_connection = 5;
//最大连接数
private static final Integer max_connection = 250;
//最大处理时间 60*60
private static final Long max_idle = 3600L;
//主程序睡眠时间
private static final Long maint_sleep = 10L;
static{
//获取scoke连接池的实例对象
SockIOPool pool = SockIOPool.getInstance();
pool.setServers(services);
pool.setWeights(weights);
pool.setInitConn(init_connection);
pool.setMinConn(min_connection);
pool.setMaxConn(max_connection);
pool.setMaxIdle(max_idle);
pool.setMaintSleep(maint_sleep);
//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();
//超过指定大小就压缩
//mcc.setCompressEnable(true);
//mcc.setCompressThreshold(65536L);
}
private Memcached(){}
private static Memcached getInstance(){
return memcached;
}
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);
}
public Object get(String key){
return mcc.get(key);
}
public static void main(String[] args) {
Memcached memcached = Memcached.getInstance();
boolean s = memcached.add("abc", new String("123"));
System.out.println(s);
System.out.println(memcached.get("abc"));
}
}
一、在Linux上安装memcached:
1. Linux上的memcache需要俩个安装包:libevent-1.4.12-stable.tar.gz 、memcached-1.4.3.tar.gz 解压安装:
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tar -zxf libevent-1.4.12-stable.tar.gz
tar -zxf memcached-1.4.3.tar.gz
tar -zxf libevent-1.4.12-stable.tar.gz tar -zxf memcached-1.4.3.tar.gz进入libevent并安装
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# cd libevent-1.4.12-stable
# ./configure --prefix=/usr/local/libevent
# make
# sudo make install
# cd libevent-1.4.12-stable # ./configure --prefix=/usr/local/libevent # make # sudo make install测试libevent是否安装成功:
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# ls -al /usr/lib | grep libevent
# ls -al /usr/lib | grep libevent进入memcache并安装
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# cd ../ memcached-1.4.3
# ./configure --prefix=/usr/local/memcached --with-libevent=/usr/local/libevent
# make
# sudo make install
# cd ../ memcached-1.4.3 # ./configure --prefix=/usr/local/memcached --with-libevent=/usr/local/libevent # make # sudo make install2、在Linux上启动memcached(启动时指定端口号)
# /usr/local/memcached/bin/memcached -d -m 528 -u ligang -p12131
-m 启动内存 -u 启动用户 -p
端口
测试启动是否成功:
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telnet ip port
telnet 172.17.3.135 12135
telnet ip port telnet 172.17.3.135 121353、查看memcached进程并关闭memcached
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ps -aux |grep mem
ps -aux |grep mem
二、Windows下安装:
1. 首先准备好memcache windows稳定版2. 以管理员省份运行DOS窗口
3. memcached.exe -d install
4. memcached.exe -d start
5. 查看是否安装成功services.msc
设置memcached,启动该服务后,memcached服务默认占用的端口是11211,占用的最大内存默认是64M。如果需要修改这两个参数,比如修改端口为10000,内存为512,则输入:
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D:\memcached\memcached.exe -p 10000 -m 512 -d start
D:\memcached\memcached.exe -p 10000 -m 512 -d start-p 表示要修改的端口,
-m表示占用的最大内存(单位为M)。
上述命令无效,通过修改注册表实现
[plain]
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copy
print?
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\memcached Server
其中的ImagePath项的值为:"c:\memcached\memcached.exe" -d runservice
改成:"c:\memcached\memcached.exe" -p 15000 -d runservice
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\memcached Server 其中的ImagePath项的值为:"c:\memcached\memcached.exe" -d runservice 改成:"c:\memcached\memcached.exe" -p 15000 -d runservice7.常用命令:
A. telnet到memcache服务器,如:telnet 127.0.0.1 11211(11211是memcache的默认端口)
进入上述环境后,下面命令可用:
B. stats 查看基本信息
C. stats items 查看items
D. get key(key 为 item后面的字符串即键)
E. -c 最大同时连接数,默认是1024
F. -f 块大小增长因子,默认是1.25
G. -n 最小分配空间,key+value+flags默认是48
H. -h 显示帮助
三、JAVA实例
所需要的jiar包:commons-pool-1.5.6.jar、java_memcached-release_2.6.3.jar、slf4j-api-1.6.1.jar、slf4j-simple-1.6.1.jar[java]
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package memcachedDemo;
import java.util.Date;
import com.danga.MemCached.MemCachedClient;
import com.danga.MemCached.SockIOPool;
public class Memcached {
private static MemCachedClient mcc = new MemCachedClient();
private static Memcached memcached = new Memcached();
//服务群组
private static final String[] services = {"127.0.0.1:11211"};
//服务器群各自对应的权重
private static final Integer[] weights = {1};
//初始化连接数
private static final Integer init_connection = 5;
//最小连接数
private static final Integer min_connection = 5;
//最大连接数
private static final Integer max_connection = 250;
//最大处理时间 60*60
private static final Long max_idle = 3600L;
//主程序睡眠时间
private static final Long maint_sleep = 10L;
static{
//获取scoke连接池的实例对象
SockIOPool pool = SockIOPool.getInstance();
pool.setServers(services);
pool.setWeights(weights);
pool.setInitConn(init_connection);
pool.setMinConn(min_connection);
pool.setMaxConn(max_connection);
pool.setMaxIdle(max_idle);
pool.setMaintSleep(maint_sleep);
//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();
//超过指定大小就压缩
//mcc.setCompressEnable(true);
//mcc.setCompressThreshold(65536L);
}
private Memcached(){}
private static Memcached getInstance(){
return memcached;
}
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);
}
public Object get(String key){
return mcc.get(key);
}
public static void main(String[] args) {
Memcached memcached = Memcached.getInstance();
boolean s = memcached.add("abc", new String("123"));
System.out.println(s);
System.out.println(memcached.get("abc"));
}
}
package memcachedDemo; import java.util.Date; import com.danga.MemCached.MemCachedClient; import com.danga.MemCached.SockIOPool; public class Memcached { private static MemCachedClient mcc = new MemCachedClient(); private static Memcached memcached = new Memcached(); //服务群组 private static final String[] services = {"127.0.0.1:11211"}; //服务器群各自对应的权重 private static final Integer[] weights = {1}; //初始化连接数 private static final Integer init_connection = 5; //最小连接数 private static final Integer min_connection = 5; //最大连接数 private static final Integer max_connection = 250; //最大处理时间 60*60 private static final Long max_idle = 3600L; //主程序睡眠时间 private static final Long maint_sleep = 10L; static{ //获取scoke连接池的实例对象 SockIOPool pool = SockIOPool.getInstance(); pool.setServers(services); pool.setWeights(weights); pool.setInitConn(init_connection); pool.setMinConn(min_connection); pool.setMaxConn(max_connection); pool.setMaxIdle(max_idle); pool.setMaintSleep(maint_sleep); //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(); //超过指定大小就压缩 //mcc.setCompressEnable(true); //mcc.setCompressThreshold(65536L); } private Memcached(){} private static Memcached getInstance(){ return memcached; } 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); } public Object get(String key){ return mcc.get(key); } public static void main(String[] args) { Memcached memcached = Memcached.getInstance(); boolean s = memcached.add("abc", new String("123")); System.out.println(s); System.out.println(memcached.get("abc")); } }所需JAR和安装包:http://pan.baidu.com/s/1sjjX23r
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