Data deduplication using crc-seed differentiation between data and stubs
AssigneeInternational Business Machines Corporation
InventorsAllen K. BATES, Nils HAUSTEIN, Craig A. KLEIN, Frank KRICK, Ulf TROPPENS, Daniel J. WINARSKI
Life of this patent
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Abstract
Various embodiments for differentiating between data and stubs pointing to a parent copy of deduplicated data. Undeduplicated data is stored with a checksum of an initial value. A stub pointing to the parent copy of the deduplicated data is stored with an additional checksum of a differing, additional initial value.
Claims24
A method for differentiating between data and stubs pointing to a parent copy of deduplicated data using a processor device, comprising:
- storing undeduplicated data with a checksum of an initial value;
- and
- storing a stub pointing to the parent copy of the deduplicated data with an additional checksum of a differing, additional initial value.
A system for differentiating between data and stubs pointing to a parent copy of deduplicated data, comprising:
- at least one processor device operable in a computing storage environment, wherein the at least one processor device:
- stores undeduplicated data with a checksum of an initial value, and
- stores a stub pointing to the parent copy of the deduplicated data with an additional checksum of a differing, additional value.
A computer program product for differentiating between data and stubs pointing to a parent copy of deduplicated data using a processor device, the computer program product comprising a non-transitory machine-readable storage medium having machine-readable program code portions stored therein, the machine-readable program code portions comprising:
- a first executable portion that stores undeduplicated data with a checksum of an initial value;
- and
- a second executable portion for storing a stub pointing to the parent copy of the deduplicated data with an additional checksum of a differing, additional initial value.
Dependencies are inferred from the claim text.