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APPROACH FOR OPTIMIZING RESTORES OF DEDUPLICATED DATA

  • US 20110218969A1
  • Filed: 03/08/2010
  • Published: 09/08/2011
  • Est. Priority Date: 03/08/2010
  • Status: Active Grant
First Claim
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1. A method for optimizing restores of deduplicated data within a storage management system, the storage management system comprising a client computing system coupled to a client data store and a server computing system coupled to a deduplicated server data store, with the method comprising:

  • maintaining a chunk index on the client computing system, the chunk index tracking locations of chunks within files remaining on the client data store after storage of the files to the server data store;

    retrieving chunks for a specified file during a restore of the specified file from the server data store to the client data store, including for each chunk of the specified file;

    determining whether a valid entry for the chunk exists in the chunk index;

    retrieving the chunk from the server data store responsive to determining a valid entry for the chunk does not exist in the chunk index; and

    retrieving the chunk from a location on the client data store specified in the chunk index responsive to determining a valid entry for the chunk exists in the chunk index; and

    reconstructing the specified file from the retrieved copies of the chunks and completing the restore of the specified file to the client data store.

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