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:
Mar. 10, 2015
Filed:
Feb. 22, 2012
Applicants:
Qin Xin, Broken Arrow, OK (US);
Feng Zhang, Sherborn, MA (US);
Qi Bao, Boxborough, MA (US);
Inventors:
Assignee:
EMC Corporation, Hopkinton, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 12/00 (2006.01); G06F 17/30 (2006.01); H04N 21/231 (2011.01);
U.S. Cl.
CPC ...
H04N 21/23103 (2013.01);
Abstract
An improved technique for distributed data storage employs multiple DHT (distributed hash table) rings provided at different levels of a network hierarchy. A computing node is identified for data storage by performing multiple hashing operations, one for each DHT ring. The hashing operations for the different rings are distinct in that they are performed using different hashing functions and/or are performed on different data sources. In one example, a 2-level DHT is formed from a group of LANs forming a first DHT ring and a group of computing nodes, within each LAN, forming a second DHT ring.