Dynamic rewrite of files within deduplication system
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United States of America Patent
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Apr 30, 2013
Grant Date -
Sep 20, 2012
app pub date -
Jun 4, 2012
filing date -
Dec 1, 2010
priority date (Note) -
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Abstract
A dynamic layer above a sequential deduplication file system (denoted as DFS) implements the rewrite functionality. A user file is composed of one or more DFS files. As incoming data is written into a user file, the data is written by the dynamic layer sequentially into DFS files, created one by one. For each user file this dynamic layer creates and maintains a dynamic metadata file, in a regular, non deduplicated file system. This metadata file contains entries pointing to sections of DFS files.
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