摘要
本文论述了oracle数据库自身强大的数据备份功能及怎样制定一套标准的备份与恢复方案。Oracle为用户提供了三种可供选择的方案。最简单的是逻辑备份,即装库与卸库,使用export和import工具进行装库与卸库。有很多优点,比如不用关库、很强跨平台性,另外用法也简单。但是装库与卸库方案也有局限性,例如数据一致性的问题。重点介绍了物理备份,包括冷备份和热备份。冷备份可以把数据库使用的每个文件都被备份下来。可将数据库恢复到它被关闭的状态。在每次做冷备份之前都要关闭数据库,这在数据库连续运行日益重要的今天,已不太被人们所采用。热备份必须在归档方式下进行,可将数据库恢复到任一时间点的状态,是在发生介质损坏时最后的防线,是真正意义上的完全备份。文章以大庆油田公司采油一厂的实际应用情况为例,给出了一个数据库热备份的实例。对三种备份方式进行总结,比较优缺点,给出适用范围。
This paper discusses the powerful data backup functions of ORACLE database and how to work out a set of standard backup and restoration project. ORACLE provides 3 optional projects for customers. The most simple one is logic backup which has many advantages. But there are some limitations in loading and unloading. The paper lays stress on the physical backup,including cold and hot backup. Taking the practical application in the First oil production plant of Daqing Oilfield Company as an example, it presents a case of hot backup. These three backup modes are summarized and compared with each other, then the applicability is given out.
出处
《石油工业计算机应用》
2006年第1期44-47,2,共4页
Computer Applications Of Petroleum
