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. 28, 2010
Filed:
Jan. 11, 2008
Garth Gibson, Pittsburgh, PA (US);
Nabeel Mian, Mississauga, CA;
Jason Small, Pittsburgh, PA (US);
Panasas, Inc., Pittsburgh, PA (US);
Abstract
Parallel reconstruction of file components following a failure of one or more of the storage devices is implemented in the context of a storage system that includes a plurality of storage devices for storing file components and a plurality of metadata managers. A storage device having one or more unrecoverable read errors requiring reconstruction is identified. A metadata manager which will serve as a scheduler, and a plurality of metadata managers which serve as a plurality of workers, are identified. The plurality of workers includes metadata managers other than the scheduler. A scheduler service running on the metadata manager identified as the scheduler is used to construct a list of file components from the storage device affected by the one or more unrecoverable read errors requiring reconstruction. The scheduler service assembles a work list corresponding to each of a plurality of the workers. The work list for each worker includes a subset of file components from the list requiring reconstruction. The scheduler service instructs each worker to reconstruct data contained in the subset of file components on the work list of said worker. In response to the instructions from the scheduler service, the plurality of workers operates in parallel to reconstruct the data contained in the file components requiring reconstruction.