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:
Apr. 25, 2006
Filed:
Dec. 19, 2002
Mark C. Holland, Pittsburgh, PA (US);
Mark C. Holland, Pittsburgh, PA (US);
Panasas, Inc., Pittsburgh, PA (US);
Abstract
A data storage methodology wherein fault tolerance is accomplished by generation of multiple canonical names for each primary manager active in the data storage system and then balancing the primary manager's failure-induced workload across the multiple backup managers using the canonical names. A qualified name for each backup manager is derived from a canonical name assigned to the primary manager. During fault-free state of operation, all the qualified names are assigned to the primary manager, which serves all its qualified names. When that primary manager fails, the work it was supporting is distributed among its backup managers using the qualified names for those backups. The distribution of primary manager's workload among multiple backups eliminates the severe performance bottlenecks present in the traditional approach of keeping one backup manager for a primary manager and keeping that backup manager idle during the fault-free state of its primary manager.