Patent · US Active

Data deduplication using CRC-seed differentiation between data and stubs

US9015552B2 · kind B2 · utility

6Cited by

5References

24Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Allen Keith Bates · Tucson, US
Nils Haustein · Nieder-Olm, DE
Craig Anthony Klein · Tucson, US
Frank Krick · Ockenheim, DE
Ulf Troppens · Mainz, DE
Daniel J. Winarski · Tucson, US

Key dates

Filing date	May 14, 2013
Grant date	Apr 21, 2015
Priority date	—
Expiry date	Jun 29, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH03M13/09
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Various embodiments for differentiating between data and stubs pointing to a parent copy of deduplicated data are provided. Undeduplicated data is stored with a checksum of an initial value as a first cyclic redundancy check (CRC) seed. A stub pointing to the parent copy of the deduplicated data is stored with an additional checksum of a differing, additional initial value as a second CRC seed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.