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System and method for updating a copy-on-write snapshot based on a dirty region log

  • US 7,395,378 B1
  • Filed: 01/04/2005
  • Issued: 07/01/2008
  • Est. Priority Date: 01/04/2005
  • Status: Active Grant
First Claim
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1. A method comprising:

  • accessing information in a dirty region log;

    updating a copy-on-write snapshot change tracking map, based on the information in the dirty region log, wherein the updating is performed in response to an indication of a dirty region log cleaning cycle; and

    inhibiting the dirty region log cleaning cycle until after the copy-on-write snapshot change tracking map has been updated based on the information in the dirty region log.

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