Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Himanshu Aggarwal0
Andy C. Kahn0
Eric C. Hamilton0
Date of Patent
July 19, 2011
Patent Application Number
10973229
Date Filed
October 25, 2004
Patent Primary Examiner
Patent abstract
A storage system, such as a file server, creates persistent consistency point images (PCPI) or “snapshots” that are point-in-time representations of the storage system. The storage system uses persistent consistency point images to backup or mirror data. Using data already found in the data block maps associated with these PCPI, the rate of change of data between persistent consistency point images can be determined.
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