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DATABASE RECOVERY METHOD APPLYING UPDATE JOURNAL AND DATABASE LOG

机译:应用更新日志和数据库日志的数据库恢复方法

摘要

A database recovery method including a computer and a storage system, in which: the storage system includes a disk drive for storing data; the disk drive includes a data volume, a snapshot volume, a database log for storing an update log, and an update journal for storing update information of the data volume; a recovery point for indicating an end point of a range to which the update journal is to be applied and a starting point of a range to which the database log is to be applied is recorded to recover the data volume; and when the database is to be recovered, the update journal is applied to the snapshot volume up to the recovery point, the snapshot volume after the update is switched to the data volume, and the database log after the recovery point is applied to the data volume that is set by switching.
机译:一种数据库恢复方法,包括计算机和存储系统,其中:所述存储系统包括用于存储数据的磁盘驱动器;以及磁盘驱动器包括数据卷,快照卷,用于存储更新日志的数据库日志和用于存储数据卷的更新信息的更新日志。记录恢复点,该恢复点用于指示将要应用更新日志的范围的终点和将要应用数据库日志的范围的起点以恢复数据量;当要恢复数据库时,将更新日志应用于快照卷直至恢复点,将更新后的快照卷切换为数据卷,并将恢复点之后的数据库日志应用于数据通过切换设置的音量。

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