Providing snapshots of virtual storage devices
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United States of America Patent
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Feb 24, 2015
Grant Date -
N/A
app pub date -
Sep 4, 2012
filing date -
Sep 1, 2011
priority date (Note) -
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Abstract
In general, one aspect of the subject matter described in this specification can be embodied in methods that include receiving, at a computer system, a request to create a snapshot of a virtual storage device, wherein the virtual storage device virtually stores data at virtual addresses, the data being physically stored at a plurality of physical storage locations that are managed by an underlying storage system associated with virtual storage device; the methods can further include identifying, by the computer system, one or more regions of the virtual storage device that have been written to since a previous snapshot of the virtual storage device was created; the methods can additionally include generating a unique identifier for the requested snapshot; and creating the requested snapshot using the identified one more regions and the unique identifier.
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