System and method for restoring a single file from a snapshot
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United States of America Patent
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May 23, 2006
Grant Date -
Sep 25, 2003
app pub date -
Mar 19, 2002
filing date -
Mar 19, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention provides a system and method for restoring a single file from a snapshot without the need to copy every individual block or inode from the snapshot. A file restore process duplicates the inode of a file within the active file system and performs a reconciliation process between the blocks of the twin inode and the snapshot inode. If the file does not exist within the active file system, a new buffer tree is created that points to the data blocks stored in the snapshot.
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