Method and system for efficient migration of a storage object between storage servers based on an ancestry of the storage object in a network storage system
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United States of America Patent
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Apr 23, 2013
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N/A
app pub date -
Nov 13, 2009
filing date -
Sep 28, 2009
priority date (Note) -
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Abstract
Embodiments of the present invention provide a method and system, in a network storage system, for efficiently migrating a storage object (vdisk) from a first storage server (source) to a second storage server (destination) using data of a related vdisk at the destination. A related vdisk includes an earlier created vdisk (parent) from which the vdisk to be migrated (child) is generated (cloned). By virtue of the cloned relationship, the parent and child have a portion of data blocks in common. When a parent is available at the destination, only the changed data blocks between the parent and child need to be migrated for efficiently constructing the child at the destination.
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