当您将数据库备份恢复到另一台服务器时，可能会遇到孤立用户的问题。
When you restore a database backup to another server, you may experience a problem with orphaned users.
循环日志记录通常在数据仓库环境中使用，在该环境中，恢复数据库需要的只是恢复数据库映象的问题。
Circular logging is typically used in data warehouse environments where the need to recover a database is just a matter of restoring a database image.
同样的，如果您的数据库有太多问题，恢复整个数据库也许是合理的。
Similarly, if there are too many problems with your database, it might make sense to restore the entire database.
介绍了在实践中对ORACLE数据库进行备份和恢复时所遇到的问题并详细叙述了解决该问题的办法。
This paper introduces the problem that ORACLE database is backed up and restored in practice. The solution to the problem is also expounded in detail.
最后详细设计了用户数据的备份机制，并针对VLR数据库中存在问题进行分析，提出了三种典型错误恢复解决方案。
Finally the user data backup mechanism has been detailed designed, and three kinds of recovery solutions to typical errors are discussed based on the analysis of problems existing in the VLR database.
针对用户密钥丢失导致加密数据不可恢复和传统数据库保护数据存在的问题，设计了一种高安全性的密钥恢复机制。
This paper introduces a high security mechanism for key management to solve the problems, which are derived by key exposure and exploit of traditional database storage.
该机制通过非对称加密算法、随机密钥加密用户备份信息，以及“一次一密”加密数据库等手段有效解决传统密钥恢复机制在密钥产生、存储、备份、恢复过程中的安全问题。
In this mechanism, random encryption key, asymmetric encryption algorithm and one-time key for database encryption are used to ensure the key's safety in generation, storage, backup and recovery.
该机制通过非对称加密算法、随机密钥加密用户备份信息，以及“一次一密”加密数据库等手段有效解决传统密钥恢复机制在密钥产生、存储、备份、恢复过程中的安全问题。
In this mechanism, random encryption key, asymmetric encryption algorithm and one-time key for database encryption are used to ensure the key's safety in generation, storage, backup and recovery.
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