深入浅出MySQL双向复制技术
设置MySQL数据同步(单向双向)由于公司的业务需求,需要网通和电信的数据同步,就做了个MySQL的双向同步,记下过程,以后用得到再翻出来,也贴出来供大家参考。 一、准备服务器 由于MySQL不同版本之间的(二进制日志)binlog格式可能会不一样,因此最好的搭配
设置MySQL数据同步(单向&双向)由于公司的业务需求,需要网通和电信的数据同步,就做了个MySQL的双向同步,记下过程,以后用得到再翻出来,也贴出来供大家参考。
一、准备服务器
由于MySQL不同版本之间的(二进制日志)binlog格式可能会不一样,因此最好的搭配组合是Master的MySQL版本和Slave的版本相同或者更低,Master的版本肯定不能高于Slave版本。
more.. | less.. | 本文中,我们假设主服务器(以下简称Master)和从服务器(以下简称Slave)的版本都是5.0.27,操作系统是RedHat Linux 9。
假设同步Master的主机名为:A(IP:192.168.0.1),Slave主机名为:B(IP:192.168.0.2),2个MySQL的basedir目录都是/usr/local/mysql,datadir都是:/var/lib/mysql。
二、设置同步服务器
1、设置同步Master
修改 my.cnf 文件,在
<p># Replication Master Server (default)</p> <p># binary logging is required for replication</p> Copy after login |
添加如下内容:
<p>log-bin=/var/log/mysql/updatelog</p> <p>server-id = 1</p> <p>binlog-do-db=test</p> <p>binlog-ignore-db=mysql</p> <p><wbr></wbr></p> Copy after login |
重启MySQL,创建一个MySQL帐号为同步专用
<p>GRANT REPLICATION SLAVE,RELOAD,SUPER, ON *.* TO back@192.168.0.2 IDENTIFIED BY 'back' ;</p> <p>FLUSH PRIVILEGES ;</p> <p>2、设置同步Slave</p> <p>修改my.cnf文件,添加</p> <p>server-id = 2</p> <p>master-host = 192.168.0.1</p> <p>master-user = back</p> <p>master-password = back</p> <p>master-port = 3306</p> <p>replicate-ignore-db=mysql (我的是Ver 14.14 Distrib 5.1.22-rc版,这个参数好像用不上)</p> <p>replicate-do-db=test</p> Copy after login |
重启MySQL
3、启动同步
在主服务器A MySQL命令符下:
<p>show master status;</p> Copy after login |
显示(当然这个是我机器的情况,你的不可能跟我一样哈,只是个例子):
<p>+------------------+----------+-------------------+------------------+</p> <p>| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |</p> <p>+------------------+----------+-------------------+------------------+</p> <p>| updatelog.000028 | 313361 | test | mysql |</p> <p>+------------------+----------+-------------------+------------------+</p> Copy after login |
在从服务器A MySQL命令符下:
<p>slave stop;</p> <p>CHANGE MASTER TO MASTER_LOG_FILE='updatelog.000028',MASTER_LOG_POS=313361;</p> <p>slave start;</p> <p>用show slave status\G;看一下从服务器的同步情况</p> <p>Slave_IO_Running: Yes</p> <p>Slave_SQL_Running: Yes</p> Copy after login |
如果都是yes,那代表已经在同步
往表里面写点数据测试一下看是否同步成功,如果不成功,绝对不是你的RP问题,再检查一下操作步骤!
4、设置双向同步
修改B服务器的my.cnf,添加
<p>log-bin=/var/log/mysql/updatelog</p> <p>binlog-do-db=test</p> <p>binlog-ignore-db=mysql</p> Copy after login |
重启MySQL,创建一个MySQL帐号为同步专用
<p>GRANT REPLICATION SLAVE,RELOAD,SUPER, ON *.* TO back@192.168.0.1 IDENTIFIED BY 'back' ;</p> <p>FLUSH PRIVILEGES ;</p> Copy after login |
修改A服务器的my.cnf,添加
<p>master-host = 192.168.0.2</p> <p>master-user = back</p> <p>master-password = back</p> <p>master-port = 3306</p> <p>replicate-ignore-db=mysql</p> <p>replicate-do-db=test</p> Copy after login |
重启MySQL
在主服务器B MySQL命令符下:
<p>show master status;</p> Copy after login |
在服务器A MySQL命令符下:
<p>slave stop;</p> <p>CHANGE MASTER TO MASTER_LOG_FILE='updatelog.000028',MASTER_LOG_POS=13753;</p> <p>slave start;</p> Copy after login |
其实也就是A->B单向同步的反向操作!双向同步,就这么简单啦!

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