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PESSIMISTIC DATA READING IN A DISPERSED STORAGE NETWORK

  • US 20110072210A1
  • Filed: 11/24/2010
  • Published: 03/24/2011
  • Est. Priority Date: 10/09/2007
  • Status: Active Grant
First Claim
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1. A method comprises:

  • receiving a data retrieval request;

    determining a read threshold number of dispersed storage (DS) units of a DS unit storage set in response to the data retrieval request;

    sending read request messages to the read threshold number of DS units;

    entering a loop, wherein the loop includes;

    receiving encoded data slices within a time period to produce received encoded data slices;

    when the number of received encoded data slices compares unfavorably to a decode threshold number;

    determining an incremental number of encoded data slices based on the number of received encoded data slices and the decode threshold number;

    determining an incremental number of DS units of the DS unit storage set;

    sending a read request message to each of the incremental number of DS units; and

    repeating the loop; and

    when the number of received encoded data slices compares favorably to the decode threshold number of encoded data slices, exiting the loop; and

    dispersed storage error decoding the received encoded data slices to produce data.

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