Read-write snapshots
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United States of America Patent
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Jan 16, 2007
Issued Date -
N/A
app pub date -
Sep 4, 2003
filing date -
Sep 6, 2002
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Abstract
A chain of snapshots includes read-write snapshots descending from a read only snapshot. The read only snapshots presents a constant view of the data at the time the read only snapshot is created, and the read-write snapshot starts with the view but can be modified by the user without changing the view of its parent snapshot (e.g., the read only snapshot). Accordingly, the read-write snapshot can be written for various testing purposes while the read only snapshot remains undisturbed to preserve the original data.
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