CentOS 6.5 安装 libevent、Memcached、magent 及测试集群环境

一、安装 libevent

1、安装 gcc

yum install gcc

2、设置安装路径

./configure -prefix=/home/wangzh/work/libevent-2.0.22

3、编译

make

4、安装

make install

二、安装 Memcached

1、设置安装路径

./configure --prefix=/home/wangzh/work/memcached-1.4.25 --with-libevent=/home/wangzh/work/libevent-2.0.22

2、编译

make

3、安装

make install

4、建立软连

ln -s /home/wangzh/work/memcached-1.4.25/bin/memcached /usr/bin/memcached

三、安装 magent

1、解压 magent 到指定文件夹下。

2、/sbin/ldconfig

3、sed -i "s#LIBS = -levent#LIBS = -levent -lm#g" Makefile

4、修改文件 Makefile

LIBS = /home/wangzh/work/libevent-2.0.22/lib/libevent.a /usr/lib64/libm.a

CFLAGS = -Wall -g -O2 -I/home/wangzh/work/libevent-2.0.22/include $(M64)

5、make

6、cp magent /usr/bin/magent

报错1：

gcc -Wall -g -O2 -I/usr/local/include -m64 -c -o magent.o magent.c

magent.c: In function 'writev_list':

magent.c:729: error: 'SSIZE_MAX' undeclared (first use in this function)

magent.c:729: error: (Each undeclared identifier is reported only once

magent.c:729: error: for each function it appears in.)

make: *** [magent.o] Error 1

解决办法：

[root@centos6 memcached]# vi ketama.h

#在开头加入

#ifndef SSIZE_MAX

#define SSIZE_MAX 32767

#endif

报错2：

gcc -Wall -g -O2 -I/usr/local/include -m64 -c -o magent.o magent.c

gcc -Wall -g -O2 -I/usr/local/include -m64 -c -o ketama.o ketama.c

gcc -Wall -g -O2 -I/usr/local/include -m64 -o magent magent.o ketama.o /usr/lib64/libevent.a /usr/lib64/libm.a

gcc: /usr/lib64/libevent.a: No such file or directory

gcc: /usr/lib64/libm.a: No such file or directory

解决办法：

[root@centos6 memcached]# ln -s /usr/lib/libevent* /usr/lib64/

[root@centos6 memcached]# make

报错3：

gcc -Wall -g -O2 -I/usr/local/include -m64 -o magent magent.o ketama.o /usr/lib64/libevent.a /usr/lib64/libm.a

gcc: /usr/lib64/libm.a: No such file or directory

make: *** [magent] Error 1

解决办法：

yum install glibc glibc-devel

如果是64bit的系统则不会在/usr/lib64/libm.a 生成，如果是32bit即会有。

[root@centos6 memcached]# cp /usr/lib64/libm.so /usr/lib64/libm.a

报错4：

gcc -Wall -g -O2 -I/usr/local/include -m64 -o magent magent.o ketama.o /usr/lib64/libevent.a /usr/lib64/libm.a

/usr/lib64/libevent.a(event.o): In function `detect_monotonic':

event.c:(.text+0xc79): undefined reference to `clock_gettime'

/usr/lib64/libevent.a(event.o): In function `gettime':

event.c:(.text+0xd60): undefined reference to `clock_gettime'

collect2: ld returned 1 exit status

make: *** [magent] Error 1

解决办法：

[root@centos6 memcached]# vi Makefile

CFLAGS = -Wall -g -O2 -I/usr/local/include $(M64)

改为：

CFLAGS = -lrt -Wall -g -O2 -I/usr/local/include $(M64)

四、使用 Java 客户端连接测试集群

1、导入maven 包

mvn install:install-file -Dfile=java_memcached-release_2.6.6.jar -DgroupId=com.danga -DartifactId=memcached -Dversion=2.6.6 -Dpackaging=jar -DgeneratePom=true

<dependency>
  <groupId>com.danga</groupId>
  <artifactId>memcached</artifactId>
  <version>2.6.6</version>
</dependency>

<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-api</artifactId>
  <version>1.7.19</version>
</dependency>
<dependency>
  <groupId>commons-pool</groupId>
  <artifactId>commons-pool</artifactId>
  <version>1.6</version>
</dependency>

2、启动集群

/usr/bin/memcached -d -m 10 -u root -l 192.168.253.128 -p 1111 -c 256 -P /tmp/memcached1.pid

/usr/bin/memcached -d -m 10 -u root -l 192.168.253.128 -p 2222 -c 256 -P /tmp/memcached2.pid

/usr/bin/memcached -d -m 10 -u root -l 192.168.253.128 -p 3333 -c 256 -P /tmp/memcached3.pid

/usr/bin/magent -u root -n 5120 -l 192.168.253.128 -p 11211 -s 192.168.253.128:1111 -s 192.168.253.128:2222 -b 192.168.253.128:3333

3、Java 客户端代码

public class CachedHelper {

    private static MemCachedClient mcc =new MemCachedClient();

    private CachedHelper(){}

    static {
        String[] servers ={"192.168.253.128:11211"};
        Integer[] weights ={2};
        SockIOPool pool = SockIOPool.getInstance();
        pool.setServers(servers);
        pool.setWeights(weights);
        pool.setInitConn(5);
        pool.setMinConn(5);
        pool.setMaxConn(250);
        pool.setMaxIdle(1000 * 60 * 60 * 60);

        // 禁用 nagle 算法
pool.setNagle(false);
        pool.setSocketConnectTO(0);
        pool.setSocketTO(3000);
        // 设置为一致性 hash算法
//        pool.setHashingAlg(3);
pool.initialize();
    }

    public static MemCachedClient getMemCachedCilent(){
        return mcc;
    }

    public static void main( String[] args ) throws InterruptedException {
        MemCachedClient mcc1=CachedHelper.getMemCachedCilent();
//        mcc1.add("key1","value1");
//        mcc1.add("key2","value2");
//
//        System.out.println("key1=" + mcc1.get("key1"));
//        System.out.println("key2="+mcc1.get("key2"));
for(int i=0;i<10;i++){
            mcc1.set("key"+i,"value"+i);
        }
        for(int i=0;i<10;i++){
            Object  obj=mcc1.get("key"+i);
            System.out.println( "key"+i+"=="+obj );
        }

    }
}

注：

启动 Java 主程序总是连接不上 magent，

解决方法：卸载 libevent-2.0.22 ，安装低版本的 libevent-1.4.15，后重新安装 Memcached、magent。

五、安装 libevent-1.4.15

1、安装 libtool

yum install libtool

2、生成 configure 文件

./autogen.sh

3、设置安装路径

./configure -prefix=/home/wangzh/work/libevent-1.4.15

4、编译

make

5、安装

make install

CentOS 6.5 安装 libevent、Memcached、magent 及测试集群环境

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