MySQL Proxy 安装与读写分离体验

一直想等到BETA版出来再试验的，可还是经不住诱惑阿,下午终于有时间测试一下了。 （本文参考地址： [url]http://blog.chinaunix.net/u/8111/showart.php?id=451420[/url]） 一、必备软件： 1、LUA    可以去LUA的官方下载：[url]www.lua.org[/url] 2、MySQL Proxy    这里有好多二进制版本。     [url]http://mysql.cdpa.nsysu.edu.tw/Downloads/MySQL-Proxy/[/url]    或者去MYSQL官方下载源代码。 3、测试过程中取消了B和C的REPLICATION。这样SQL语句一下子就看出来从哪里来的。 如果是M-S（可以先在SLAVE上进行STOP SLAVE） 二、测试主机地址： 1、MySQL Proxy 安装地址：192.168.0.234(简称A) 2、MySQL 服务器地址：192.168.0.235(简称B)/236(简称C) 三、安装体验 如果是按照二进制包安装的，跳过这一步。 1、 LUA的安装 [root @localhost ~]#tar zxvf lua-5.1.2.tar.gz  -C /usr/local [root @localhost ~]# cd /usr/local/ [root @localhost local]# mv lua-5.1 lua [root @localhost lua]# cd lua [root @localhost lua]#make local;make install;     导出环境变量： [root @localhost lua]#export LUA_CFLAGS="-I/usr/local/include" LUA_LIBS="-L/usr/local/lib -llua -ldl" LDFLAGS="-lm" 2、MySQL Proxy 安装   [root @localhost ~]#tar -zxvf mysql-proxy-0.6.1-linux-rhel4-x86-32bit.tar.gz -C /usr/local/mysql/ [root @localhost ~]#cd /usr/local/mysql [root @localhost mysql]#mv mysql-proxy-0.6.1-linux-rhel4-x86-32bit/ mysql-proxy [root @localhost sbin]# export PATH=$PATH:/usr/local/mysql/mysql-proxy/sbin/ 四、使用MySQL Proxy 1、查看帮助选项 [root @localhost ~]# mysql-proxy --help-all 2、对MySQL 操作 MySQL服务器假设已经安装。(安装步骤这里就不写了) 两台机器上的表初始结构和数据都是一样的，而且都有t_girl_user这个用户。 mysql> desc t; +-------+----------+------+-----+---------+----------------+ | Field | Type     | Null | Key | Default | Extra          | +-------+----------+------+-----+---------+----------------+ | id    | int(11)  | NO   | PRI | NULL    | auto_increment | | c_str | char(64) | NO   |     |         |                | +-------+----------+------+-----+---------+----------------+ 2 rows in set (0.00 sec) 2 rows in set (0.00 sec) 我在B上插入一条记录 mysql> insert into t(c_str) values('B'); Query OK, 1 row affected (0.00 sec) 在C上同样插入一条记录 mysql> insert into t(c_str) value('C'); Query OK, 1 row affected (0.00 sec) mysql> 3、启动MySQL-Proxy（测试读写分离） [root @localhost sbin]# mysql-proxy --proxy-read-only-backend-addresses=192.168.0.236:3306 --proxy-backend-addresses=192.168.0.235:3306  --proxy-lua-script=/usr/local/mysql/mysql-proxy/share/mysql-proxy/rw-splitting.lua & [1] 32554 让MYSQL PROXY自动启动的简单脚本 #!/bin/sh # export PATH=$PATH:/usr/local/mysql-proxy cd /usr/local/mysql-proxy ./mysql-proxy --proxy-read-only-backend-addresses=192.168.0.236:3306 --proxy-backend-addresses=192.168.0.235:3306 --proxy-lua-script=rw-splitting.lua >> /tmp/log ~ 这个例子中限制192.168.0.236为只读,192.168.0.235为可写。 4、下来我们来看试验结果。 我们用几台客户端开启4个连接。 [root@localhost ~]# /usr/local/mysql/bin/mysql -ut_girl_user -p123456 -P4040 -h192.168.0.234 -Dt_girl 我这边已经启动了好几个客户端，这里就不贴了，命令和上面的一样。 写数据。 mysql> insert into t(c_str) values ('wangwang'); Query OK, 1 row affected (0.01 sec) mysql> show processlist; +----+-------------+---------------------+--------+---------+------+-------+------------------+ | Id | User        | Host                | db     | Command | Time | State | Info             | +----+-------------+---------------------+--------+---------+------+-------+------------------+ | 12 | t_girl_user | 192.168.0.234:44975 | t_girl | Sleep   |   28 |       | NULL             | | 13 | t_girl_user | 192.168.0.234:44976 | t_girl | Sleep   |   15 |       | NULL             | | 14 | t_girl_user | 192.168.0.234:44977 | t_girl | Sleep   |   19 |       | NULL             | | 15 | t_girl_user | 192.168.0.234:44978 | t_girl | Query   |    0 | NULL  | show processlist | +----+-------------+---------------------+--------+---------+------+-------+------------------+ 4 rows in set (0.00 sec) 4 rows in set (0.00 sec) 读数据（现在还是写和读都在B上） mysql> select * from t; +----+----------+ | id | c_str    | +----+----------+ |  1 | B        | |  2 | wangwang | +----+----------+ 2 rows in set (0.00 sec) 再增加一个客户端连接。 1 row in set (0.00 sec) mysql> show processlist; +----+-------------+---------------------+--------+---------+------+-----------------------------------------------------------------------+------------------+ | Id | User        | Host                | db     | Command | Time | State                                                                 | Info             | +----+-------------+---------------------+--------+---------+------+-----------------------------------------------------------------------+------------------+ |  2 | system user |                     | NULL   | Connect | 1842 | Has read all relay log; waiting for the slave I/O thread to update it | NULL             | |  5 | root        | localhost           | t_girl | Query   |    0 | NULL                                                                  | show processlist | | 12 | t_girl_user | 192.168.0.234:44975 | t_girl | Sleep   |  446 |                                                                       | NULL             | | 13 | t_girl_user | 192.168.0.234:44976 | t_girl | Sleep   |  188 |                                                                       | NULL             | | 14 | t_girl_user | 192.168.0.234:44977 | t_girl | Sleep   |  206 |                                                                       | NULL             | | 15 | t_girl_user | 192.168.0.234:44978 | t_girl | Sleep   |  203 |                                                                       | NULL             | | 16 | t_girl_user | 192.168.0.234:44979 | t_girl | Sleep   |  164 |                                                                       | NULL             | | 17 | t_girl_user | 192.168.0.234:44980 | t_girl | Sleep   |  210 |                                                                       | NULL             | +----+-------------+---------------------+--------+---------+------+-----------------------------------------------------------------------+------------------+ 8 rows in set (0.00 sec) 现在我们来读数据。 mysql> select * from t; +----+-------+ | id | c_str | +----+-------+ |  1 | C     | +----+-------+ 1 row in set (0.00 sec) 这个数据很明显是来自C的。 再插入一条记录 mysql> insert into t(c_str) values ('wangwei'); Query OK, 1 row affected (0.00 sec) mysql> select * from t; +----+-------+ | id | c_str | +----+-------+ |  1 | C     | +----+-------+ 1 row in set (0.00 sec) C上的数据没有变。 还是没有数据。 现在跑到B上看看。 mysql> show processlist; +----+-------------+---------------------+--------+---------+------+-----------------------------------------------------------------------+------------------+ | Id | User        | Host                | db     | Command | Time | State                                                                 | Info             | +----+-------------+---------------------+--------+---------+------+-----------------------------------------------------------------------+------------------+ |  2 | system user |                     | NULL   | Connect | 1842 | Has read all relay log; waiting for the slave I/O thread to update it | NULL             | |  5 | root        | localhost           | t_girl | Query   |    0 | NULL                                                                  | show processlist | | 12 | t_girl_user | 192.168.0.234:44975 | t_girl | Sleep   |  446 |                                                                       | NULL             | | 13 | t_girl_user | 192.168.0.234:44976 | t_girl | Sleep   |  188 |                                                                       | NULL             | | 14 | t_girl_user | 192.168.0.234:44977 | t_girl | Sleep   |  206 |                                                                       | NULL             | | 15 | t_girl_user | 192.168.0.234:44978 | t_girl | Sleep   |  203 |                                                                       | NULL             | | 16 | t_girl_user | 192.168.0.234:44979 | t_girl | Sleep   |  164 |                                                                       | NULL             | | 17 | t_girl_user | 192.168.0.234:44980 | t_girl | Sleep   |  210 |                                                                       | NULL             | +----+-------------+---------------------+--------+---------+------+-----------------------------------------------------------------------+------------------+ 8 rows in set (0.00 sec) mysql> select * from t; +----+----------+ | id | c_str    | +----+----------+ |  1 | B        | |  2 | wangwang | |  3 | wangwei  | +----+----------+  3 rows in set (0.00 sec) 数据被成功插入到B 这个读写分离应该看得很清楚。其他的功能等我测试了再总结吧。 如果要知道为什么连接多了才会进行分离的话，看看 手册 论坛里面的讨论 还有其他我以前收藏的地址，可以参考以下。 [url]http://www.infoq.com/news/2007/10/mysqlproxyrwsplitting;jsessionid=F9E0B91935E82033BAFAC067A326DC4B[/url] [url]http://blogs.mysql.com/kaj/2007/12/10/combining-mysql-proxy-with-mysql-cluster/[/url]

TAG mysql,mysql proxy,读写分离

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