System and method for efficient creation of aggregate backup images
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United States of America Patent
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Apr 6, 2010
Grant Date -
N/A
app pub date -
Mar 31, 2005
filing date -
Mar 31, 2005
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Abstract
A system for efficient creation of aggregate backup images includes a plurality of backup images of a source data set, including a first and a second backup image, and a backup manager. The second backup image may include at least one data block containing an updated version of a corresponding data block in the first backup image. The backup manager may be configured maintain a first and a second image map corresponding to the first and second backup images, respectively, where each image map includes a plurality of entries pointing to data blocks of the corresponding backup image. In response to a request to create a first aggregate backup image of the source data set, the backup manager may be configured to establish a first aggregate image map including indirect pointers that point to one or more entries in each of the first and second image maps.
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