Handling temporary files in a file system with snapshots
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United States of America Patent
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Jun 7, 2011
Grant Date -
Mar 12, 2009
app pub date -
Sep 11, 2007
filing date -
Sep 11, 2007
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A temporary file is identified. The temporary file includes a data block containing a first file image. A determination is made whether the temporary block has been included in a previous snapshot. Responsive to receiving a modification of the temporary block that has been included in the previous snapshot, a modified first image is created. The modified image is stored in the original file block, and the original image is copied to a newly allocated block. The original first block is updated to include a reference to the second block.
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