System and method for providing continuous data protection
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United States of America Patent
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Aug 3, 2010
Grant Date -
Nov 29, 2007
app pub date -
Apr 28, 2006
filing date -
Apr 28, 2006
priority date (Note) -
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status (Latency Note)
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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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