Mysql高性能备份方案解决数据不间断访问(LVM快照方式备份)
Mysql高性能备份方案解决数据不间断访问(LVM快照方式备份)www.rsyslog.orgmysqlLVM快照备份特点:1、在大多数情况下,这种方式几乎算得上是热备。它无需关闭服
Mysql高性能备份方案解决数据不间断访问(LVM快照方式备份)
mysql LVM快照备份特点:
1、在大多数情况下,这种方式几乎算得上是热备。它无需关闭服务,只需要设置只读或者类似这样的限制。
2、支持所有基于本地磁盘的存储引擎,比如MYISAM、InnoDB和BDB,还支持Solid、PrimeXT和Faction。
3、备份速度最快,因为你只需要拷贝相关的二进制数据文件即可。
4、由于只是简单的拷贝文件,香港空间,因此对服务器开销非常低。
5、保存方式多种多样,你可以备份到磁带上、FTP服务器上、NFS服务器上或者其他什么网络服务器,以及使用各种网络备份软件来备份。
做到这些很简单,说到底就是拷贝文件而已。
6、恢复速度很快。恢复所需要的时间等于你把数据拷贝回来的时间。你可以想出更多的方法让这个时间变得更短。
7、无需使用昂贵的商业软件。
前期准备工作
1、创建LVM分区
更多LVM创建方法请参考 Linux LVM逻辑卷配置过程详解
2、停止mysql服务
3、挂在逻辑卷到临时目录/tmp下
4、使用tar命令迁移原来数据库目录文件到临时目录/tmp下
5、重新挂在逻辑卷到数据库目录下,并在/etc/fstab中添加开启自动挂载
并在/etc/fstab中添加开启自动挂载
6、关闭selinux
7、启动mysql服务
mysql数据库LVM快照备份
1、锁表
2、查看position信号
3、创建快照
4、解锁
5、挂载创建快照
6、读取快照进行备份(备份需要备份的即可)
7、卸载挂载的快照,然后删除快照
到此,整个备份过程就算结束了。如果你想要将内容同步到slave机上的话,那么还需要多加几个步骤。
1、把备份内容拷贝到slave的数据文件目录下。
2、重启MySQL服务器,等待恢复完成。
3、使用CHANGE MASTER TO 命令告诉slave新的二进制日志位置,并从那里开始同步,(就是我们刚刚记录下来的那个)例如:
本文出自 “小诺的Linux开源技术博客” 博客,香港虚拟主机,请务必保留此出处

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