安装repcached memcached

安装repcached memcached

 

分别在两台服务器中安装libevent与repcached memcached 

 

一、安装libevent 

1.先用：ls -al /usr/lib | grep libevent  查看是否已安装，如果已安装且版本低于1.3，则先通过：rpm -e libevent —nodeps 进行卸载。 

 

2.下载libevent安装包：libevent-1.4.13-stable.tar.gz，然后解压。 

 

3.切换到解压后的 libevent 主目录：cd libevent-1.4.13-stable 

 

4.依次执行： 

Java代码  

./configure --prefix=/usr （或 ./configure --program-prefix=/usr）    

make    

make install    

 

  注意： 

1）执行 make install 时可能需要 root 权限。 

 

2）libevent会安装到 /usr/lib 下。 

 

 

5.测试libevent是否安装成功：ls -al /usr/lib | grep libevent 

出现类似如下结果则表示安装成功： 

Java代码  

lrwxrwxrwx.  1 root root     21 Jun 17 00:35 libevent-1.4.so.2 -> libevent-1.4.so.2.1.3  

-rwxr-xr-x.  1 root root 373214 Jun 17 00:35 libevent-1.4.so.2.1.3  

-rw-r--r--.  1 root root 603890 Jun 17 00:35 libevent.a  

lrwxrwxrwx.  1 root root     26 Jun 17 00:35 libevent_core-1.4.so.2 -> libevent_core-1.4.so.2.1.3  

-rwxr-xr-x.  1 root root 137329 Jun 17 00:35 libevent_core-1.4.so.2.1.3  

-rw-r--r--.  1 root root 228968 Jun 17 00:35 libevent_core.a  

-rwxr-xr-x.  1 root root    860 Jun 17 00:35 libevent_core.la  

lrwxrwxrwx.  1 root root     26 Jun 17 00:35 libevent_core.so -> libevent_core-1.4.so.2.1.3  

lrwxrwxrwx.  1 root root     27 Jun 17 00:35 libevent_extra-1.4.so.2 -> libevent_extra-1.4.so.2.1.3  

-rwxr-xr-x.  1 root root 295868 Jun 17 00:35 libevent_extra-1.4.so.2.1.3  

-rw-r--r--.  1 root root 469074 Jun 17 00:35 libevent_extra.a  

-rwxr-xr-x.  1 root root    867 Jun 17 00:35 libevent_extra.la  

lrwxrwxrwx.  1 root root     27 Jun 17 00:35 libevent_extra.so -> libevent_extra-1.4.so.2.1.3  

-rwxr-xr-x.  1 root root    825 Jun 17 00:35 libevent.la  

lrwxrwxrwx.  1 root root     21 Jun 17 00:35 libevent.so -> libevent-1.4.so.2.1.3  

 

 

6.如果libevent的安装目录为/usr/local/lib下，则还需要建立 libevent-1.4.so.2 到 /usr/lib 的软连接，这样其他程序运行时才能找到libevent库：ln -s /usr/local/lib/libevent-1.4.so.2  /usr/lib/libevent-1.4.so.2 

 

二、安装repcached memcached 

1.下载repcached安装包：memcached-1.2.8-repcached-2.2.1.tar.gz，然后解压。 

 

2.切换到解压后的 repcached memcached 主目录：cd memcached-1.2.8-repcached-2.2.1 

 

3.依次执行： 

Java代码  

./configure --enable-replication   

make    

make install    

 

 

4.如果在64位系统中运行memcached可能会出现如下错误： 

/usr/local/bin/memcached: error while loading shared libraries: libevent-1.4.so.2: cannot open shared object file: No such file or directory 

则使用libs参数调试： 

LD_DEBUG=libs /usr/local/bin/memcached -v 

可以看到以下输出： 

Java代码  

     10641:     find library=libevent-1.4.so.2 [0]; searching  

     10641:      search cache=/etc/ld.so.cache  

     10641:      search path=/lib64/tls/x86_64:/lib64/tls:/lib64/x86_64:/lib64:/usr/lib64/tls/x86_64:/usr/lib64/tls:/usr/lib64/x86_64:/usr/lib64                (system search path)  

     10641:       trying file=/lib64/tls/x86_64/libevent-1.4.so.2  

     10641:       trying file=/lib64/tls/libevent-1.4.so.2  

     10641:       trying file=/lib64/x86_64/libevent-1.4.so.2  

     10641:       trying file=/lib64/libevent-1.4.so.2  

     10641:       trying file=/usr/lib64/tls/x86_64/libevent-1.4.so.2  

     10641:       trying file=/usr/lib64/tls/libevent-1.4.so.2  

     10641:       trying file=/usr/lib64/x86_64/libevent-1.4.so.2  

     10641:       trying file=/usr/lib64/libevent-1.4.so.2  

     10641:  

/usr/local/bin/memcached: error while loading shared libraries: libevent-1.4.so.2: cannot open shared object file: No such file or directory  

 

可知memcached并没有在/usr/lib中加载libevent-1.4.so.2，而是在/usr/lib64中。 

故在/usr/lib64中创建/usr/lib/libevent-1.4.so.2的软链接： 

ln -s /usr/lib/libevent-1.4.so.2 /usr/lib64/libevent-1.4.so.2 

 

三、验证 

1.在第一个服务器执行： 

Java代码  

[root@localhost ~]# /usr/local/bin/memcached -u nobody -l 192.168.73.201 -p 22122 -m 64 -x 192.168.73.202 -v  

replication: connect (peer=192.168.73.202:11212)  

replication: marugoto copying  

replication: close  

replication: listen  

 

 

2.在第二个服务器执行： 

Java代码  

[root@localhost ~]# /usr/local/bin/memcached -u nobody -l 192.168.73.202 -p 22122 -m 64 -x 192.168.73.201 -v  

replication: connect (peer=192.168.73.201:11212)  

replication: marugoto copying  

replication: start  

 

这时在第一个服务器中会输出： 

replication: accept 

 

3.在第一个服务器中设置key value对： 

Java代码  

[root@localhost ~]# telnet 192.168.73.201 22122  

Trying 192.168.73.201...  

Connected to 192.168.73.201.  

Escape character is '^]'.  

set hey 0 0 4  

dude  

STORED  

get hey  

VALUE hey 0 4  

dude  

END  

quit  

Connection closed by foreign host  

 

 

4.在第二个服务器中取出key value对： 

Java代码  

[root@localhost ~]# telnet 192.168.73.202 22122  

Trying 192.168.73.202...  

Connected to 192.168.73.202.  

Escape character is '^]'.  

get hey  

VALUE hello 0 4  

dude  

END  

quit  

Connection closed by foreign host.  

 

 

5.好了，repcached memcached已经安装配置完成。 

另外，安装telnet客户端的命令是： 

yum -y install telnet 

 

#后台运行： 

/usr/local/bin/memcached -d -m 128 -u root -p 11211 -P /tmp/memcached.pid 

 

# 结束memcache进程 

kill `cat /tmp/memcached.pid` 

 

参数: 

      -d 启动守护进程(后台运行) 

      -m 分配给memcache使用的内存，单位是MB 

      -u 运行memcached的用户 

      -l 监听的服务器IP 

      -p 监听的服务器端口,默认是11211 

      -c 最大运行的并发连接数，默认是1024 

      -P(大写) 保存Memcache的pid文件,后面跟路径