【摘要】 数据库系统具有强大的数据处理能力,但任何硬件或软件上的故障都可能导致数据库系统不能正常工作,因此,数据库的备份非常重要。建议数据库运行在归档方式下运行热备份。为了防止各种突发事件的出现,要对灾难过程有一个清醒的认识以及数据损失的大小、时间的可容忍性。要充分考虑备份方案中的性价比和操作的简单性、实用性,以及系统的可扩充性和安全性。更多还原

【Abstract】 The database system is very powerful in handling data, but it will be out of order due to the breakdown of the software and hardware. Thus, it is important to backup the database. On- line backup can be performed when the database is operated under the filing mode. To prevent various kinds of accidents, you should have a clear understanding of the process of the accident, and be aware of the loss of the data and the time tolerance. What’s more, in performing the backup scheme, you should take into full considerations of the factors such as the ratio of quality to cost, and the simplicity, practicality, expansibility and the security of the system.更多还原