The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 03, 2015
Filed:
Apr. 30, 2012
David D. Chambliss, Morgan Hill, CA (US);
Mihail C. Constantinescu, San Jose, CA (US);
Joseph S. Glider, Palo Alto, CA (US);
Maohua LU, San Jose, CA (US);
David D. Chambliss, Morgan Hill, CA (US);
Mihail C. Constantinescu, San Jose, CA (US);
Joseph S. Glider, Palo Alto, CA (US);
Maohua Lu, San Jose, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Detecting data duplication comprises maintaining a fingerprint directory including one or more entries, each entry including a data fingerprint and a data location for a data chunk. Each entry is associated with a seen-count attribute which is an indication of how often the fingerprint has been seen in arriving data chunks. Higher-frequency entries in the directory are retained, while also taking into account recency of data accesses. A data duplication detector detects that the data fingerprint for a new chunk is the same as the data fingerprint contained in an entry in the fingerprint directory.