FastBack是介于传统备份软件（Schedule Backup）和持续备份软件（CDP）之间的产品，IBM称之为快照备份（Snapshot Backup），可以理解为基于文件数据块的增量备份（即只备份数据块变化的部分）。
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A backup operation that USES DB2 ACS is often referred to as a snapshot backup.
使用DB 2 ACS的备份操作通常称为快照备份。
This will create an external snapshot and then perform a backup of that snapshot to a backup device such as tape.
可以使用该实用程序创建一个外部快照，然后将该快照备份到磁带等备份设备。
A whole-system backup is a snapshot of the entire system at a single point in time (known as the archive checkpoint).
全系统备份是某一指定时间点(即归档检查点)上整个系统的快照。
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