Dynamic rewrite of files within deduplication system
AssigneeInternational Business Machines Corporation
InventorsLior ARONOVICH, Samuel KRIKLER, Asaf LEVY, Amit SCHREIBER
Life of this patent
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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.
Claims7
A method for rewriting data in a deduplication storage environment by a processor device, comprising:
- storing rewritten data in new deduplication file system (DFS) files;
- quoting unmodified data from original DFS files affected by rewrite operations into new DFS files;
- and
- deleting the original DFS files.
Dependencies are inferred from the claim text.