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:
Sep. 13, 2011
Filed:
Mar. 04, 2009
Rekha N Bachwani, Piscataway, NJ (US);
Leszek R Gryz, Warsaw, PL;
Ricardo G Bianchini, Plainsboro, NJ (US);
Cezary Dubnicki, Warsaw, PL;
Rekha N Bachwani, Piscataway, NJ (US);
Leszek R Gryz, Warsaw, PL;
Ricardo G Bianchini, Plainsboro, NJ (US);
Cezary Dubnicki, Warsaw, PL;
NEC Laboratories America, Inc., Princeton, NJ (US);
Abstract
Data is stored in a distributed data storage system comprising a plurality of disks. When a disk fails, system reliability is restored by executing a set of reconstructions according to a schedule. System reliability is characterized by a dynamic Normalcy Deviation Score. The schedule for executing the set of reconstructions is determined by a minimum intersection policy. A set of reconstructions is received and divided into a set of queues rank-ordered by redundancy level ranging from a lowest redundancy level to a highest redundancy level. For reconstructions in each queue, an intersection matrix is calculated. Diskscores for each disk are calculated. The schedule for the set of reconstructions is based at least in part on the intersection matrices, the Normal Deviation Scores, and the diskscores.