Method and system to make a read-only file system appear to be writeable
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United States of America Patent
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Sep 8, 2009
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N/A
app pub date -
Jul 11, 2006
filing date -
Jul 11, 2006
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Abstract
A writeable clone of a read-only dataset, e.g., an RPPI of a file system, a mirror file system, etc., is created to make the read-only dataset appear from a client's perspective to be modifiable/writeable, yet without actually modifying the read-only dataset itself. Any change attempted to be made on the read-only dataset is stored in the writeable clone. In one embodiment, the clone shares data blocks with the read-only dataset.
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