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Revision deletion markers

  • US 9,576,018 B2
  • Filed: 08/01/2014
  • Issued: 02/21/2017
  • Est. Priority Date: 10/09/2007
  • Status: Active Grant
First Claim
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1. A method comprises:

  • receiving a delete data object request to delete a data object within a dispersed storage network (DSN);

    determining a set of dispersed storage (DS) units within the DSN that store a set of encoded data slices associated with the data object;

    determining a revision number of the set of encoded data slices;

    determining a delete marker based on one or more of information in the delete data object request, operational parameters, the set of DS units, a data object name, a source name, a slice name and the revision number;

    sending the delete marker and a write command to the set of DS units for deletion of the data object;

    receiving at least one receive write acknowledgement from at least some DS units of the set of DS units to produce the deletion;

    when a number of the write acknowledgements received from the at least some DS units meets a write threshold, sending a commit command to the set of DS units and receiving commit acknowledgements from at least some DS units; and

    when a number of the commit acknowledgements received from the at least some DS units meets the write threshold, sending a finalize command to the set of DS units to delete the data object.

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