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Intelligent deduplication data prefetching

  • US 8,762,349 B2
  • Filed: 07/14/2011
  • Issued: 06/24/2014
  • Est. Priority Date: 07/14/2011
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • receiving a read input/output (I/O) request at a deduplication system node;

    accessing a deduplication dictionary to determine a first location having data corresponding to the read I/O request;

    caching headers for a plurality of datastores related to the first location, wherein cache is configured to cache the headers for the plurality of datastores related to the first location upon receiving the read I/O request associated with a single datastore at the first location;

    receiving a subsequent read I/O request at the deduplication system node;

    performing a lookup in cached headers before accessing any deduplication dictionary;

    responding to the subsequent read I/O request.

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