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, 2020
Filed:
Oct. 31, 2017
Applicant:
Emc Ip Holding Company Llc, Hopkinton, MA (US);
Inventors:
Philippe Armangau, Acton, MA (US);
John Gillono, North Chelmsford, MA (US);
Maher Kachmar, Marlborough, MA (US);
Christopher A. Seibel, Walpole, MA (US);
Assignee:
EMC IP Holding Company LLC, Hopkinton, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 16/17 (2019.01); G06F 3/06 (2006.01); G06F 16/13 (2019.01); G06F 16/174 (2019.01);
U.S. Cl.
CPC ...
G06F 3/0641 (2013.01); G06F 3/065 (2013.01); G06F 3/0608 (2013.01); G06F 16/137 (2019.01); G06F 16/1748 (2019.01); G06F 3/067 (2013.01);
Abstract
A technique for storing data in a data storage system detects that a read is being performed pursuant to a data copy request. In response, the data storage system stores a digest of the data being read in an entry of a digest cache. Later, when a write pursuant to the same copy request arrives, the storage system obtains the entry from the digest cache and completes the write request without creating a duplicate copy of the data.