如果出现问题，应用程序必须能够恢复数据库服务器并快速地让它投入工作。
If a problem does arise, the application must be able to recover the database server and quickly return it to full operation.
在DB 2中，可能需要恢复整个数据库来解决该问题，这可能大太实际。
In DB2, you might need to recover the entire database to fix the problem, which probably won't be practical.
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.
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