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Apparatus, System, and Method for Enhanced Block-Level Deduplication

  • US 20110029497A1
  • Filed: 07/29/2009
  • Published: 02/03/2011
  • Est. Priority Date: 07/29/2009
  • Status: Active Grant
First Claim
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1. A computer program product comprising a computer readable storage medium:

  • having computer usable program code executable by a processor to perform operations for enhanced block-level deduplication, the operations comprising;

    storing one or more express block signatures in an express directory, the one or more express block signatures meeting a reference count requirement;

    storing one or more primary block signatures and one or more reference counts for the primary block signatures in a primary directory, wherein each primary block signature has a corresponding reference count; and

    determining whether a block signature for a data block matches one of the one or more express block signatures stored in the express directory as the data block is received by a storage device.

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