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. 08, 2009
Filed:
Nov. 01, 2005
Toby Smith, Pittsburgh, PA (US);
Richard P. Jernigan, Iv, Ambridge, PA (US);
Robert Wyckoff Hyer, Jr., Mars, PA (US);
Michael Kazar, Pittsburgh, PA (US);
David B. Noveck, Lexington, MA (US);
Peter Griess, San Francisco, CA (US);
Toby Smith, Pittsburgh, PA (US);
Richard P. Jernigan, IV, Ambridge, PA (US);
Robert Wyckoff Hyer, Jr., Mars, PA (US);
Michael Kazar, Pittsburgh, PA (US);
David B. Noveck, Lexington, MA (US);
Peter Griess, San Francisco, CA (US);
NetApp, Inc., Sunnyvale, CA (US);
Abstract
A system and method manages lock state information in a distributed file system. A meta-data volume includes a lock state database which is a comprehensive source for lock state information about a striped volume set in the system. A plurality of data volumes includes local lock caches which contain information about locks. Lock state messaging between the meta-data volume and the data volumes is used to assign locks and to update local lock caches. The meta-data volume is configured to assigned permissive areas in the data containers accessed by clients in order to efficiently manage the lock state information.