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US07769723B2 System and method for providing continuous data protection 有权
提供连续数据保护的系统和方法

System and method for providing continuous data protection
Abstract:
A system and method provides continuous data protection using checkpoints in a write anywhere file system. During a consistency point of a write anywhere file system, freed blocks are identified and are appended to a delete log for retention. A consistency point log is updated with a new entry associated with the consistency point. If the file system needs to retrieve its state at a particular point in time, the stored blocks of the delete log may be recovered.
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