如果您经常做归档备份，那么eXist的数据就不可能变得不可检索。
If you make frequent archival backups, eXist is unlikely to do anything that makes the data irretrievable.
没有归档、备份、恢复或灾难恢复的过程和机制。
No procedures or mechanisms for archiving, backup, restore, or disaster recovery exist.
为了使用联机备份，必须打开归档日志记录。
In order to use online backup, archive logging must be turned on.
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