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:
Oct. 26, 2010
Filed:
Nov. 19, 2007
David B. Noveck, Lexington, MA (US);
David B. Noveck, Lexington, MA (US);
NetApp, Inc., Sunnyvale, CA (US);
Abstract
A method for managing locking requests for a computer file is disclosed. A plurality of locks is maintained for the file, the plurality of locks having locks of different types. Constraints are tracked on the plurality of locks of different types. A request for a requested lock is received. A determination is made if the requested lock violates any of the constraints on the plurality of locks. The requested lock is granted if there is no violation of any constraint on any of the plurality of locks. The requested lock is denied if the requested lock violates any constraint on any of the plurality of locks. An action disposition set having bit positions which define each lock of the plurality of locks is maintained. Bit-wise logic using the action disposition set determines if a requested lock violates any constraint on any of the plurality of locks.