Fine-grain policy-based snapshots
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United States of America Patent
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Jan 8, 2013
Issued Date -
N/A
app pub date -
Mar 25, 2010
filing date -
Oct 31, 2007
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Abstract
Providing a snapshot copy of data includes selectively collecting a plurality of data objects based on evaluation of a predicate associated with each of the data objects and performing a snapshot operation in connection with modifying at least one of the plurality of data objects. The snapshot operation may be performed prior to modifying the at least one of the plurality of data objects. The snapshot operation may be a copy on write operation. Providing a snapshot copy of data may also include providing a data structure that maintains a plurality of snapshot instances. The data structure may be a table. Each of the snapshot instances may include at least one of: an object set description, a timestamp indicating when the snapshot was initiated, a snapshot name and a handling policy.
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