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METHOD AND SYSTEM FOR GENERATING A SPACE-EFFICIENT SNAPSHOT OR SNAPCLONE OF LOGICAL DISKS

  • US 20110093437A1
  • Filed: 01/18/2010
  • Published: 04/21/2011
  • Est. Priority Date: 10/15/2009
  • Status: Abandoned Application
First Claim
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1. A method of a file system for generating a snapshot of at least one logical disk storing file-system data, comprising:

  • quiescing the file system upon a receipt of a command to generate the snapshot of the at least one logical disk, wherein the snapshot is a copy of the at least one logical disk at a point in time;

    determining a disk usage of the at least one logical disk at the point in time;

    generating a sharing bitmap associated with the snapshot based on the disk usage, wherein the sharing bitmap is configured to indicate sharing of the file-system data with the at least one logical disk and a predecessor snapshot immediately preceding the snapshot; and

    unquiescing the file system.

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