当数据库服务器建立好以后,我们首先要做的不是考虑要在这个支持数据库的服务器运行哪些受MySQL提携的程序,而是当数据库遭到破坏后,怎样安然恢复到最后一次正常的状态,使得数据的损失达到最
一、前言:
当数据库服务器建立好以后,我们首先要做的不是考虑要在这个支持数据库的服务器运行哪些受MySQL提携的程序,而是当数据库遭到破坏后,怎样安然恢复到最后一次正常的状态,使得数据的损失达到最小。
或者说,仅仅是数据库服务器的建立,只能说明它能做些什么,并不代表它能稳定的做些什么。灾难恢复的效率及全面性,也是系统的稳定性的一个准因素,尤其对于一个服务器系统。
这一节,介绍数据库自动备份以及数据库被破坏后的恢复的方法。在这里,我们使用mysqlhotcopy,并且定义一段Shell脚本来实现数据库的自动备份,并且,让整个数据自动备份与数据恢复过程都基于Shell。
建立数据库备份所需条件
[1] 建立自动备份脚本
在这里,为了使数据库备份和恢复的符合我们的实际要求,用一段符合要求的Shell脚本来实现整个备份过程的自动化。
[2] 运行数据库自动备份脚本
[3] 让数据库备份脚本每天自动运行
测试自动备份正常运转与否(备份恢复的方法)
这里,以通过实际操作的过程来介绍问题出现后的恢复方法。
[1] 当数据库被删除后的恢复方法
首先建立一个测试用的数据库。
然后,运行刚才建立的数据库备份脚本,备份刚刚建立的测试用的数据库。
接下来,我们再次登录到MySQL服务器中,删除刚刚建立的测试用的数据库test,以便于测试数据恢复能否成功。
以上,我们就等于模拟了数据库被破坏的过程。接下来,是数据库被“破坏”后,用备份进行恢复的方法。
然后,再次登录到MySQL服务器上,看是否已经成功恢复了数据库。
以上结果表示,数据库被删除后,用备份后的数据库成功的将数据恢复到了删除前的状态。

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