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:
Jun. 15, 2010
Filed:
Sep. 30, 2002
Anurag Agarwal, Sunnyvale, CA (US);
Harold B. Prince, Jr., Palo Alto, CA (US);
Anurag Agarwal, Sunnyvale, CA (US);
Harold B. Prince, Jr., Palo Alto, CA (US);
Symantec Operating Corporation, Mountain View, CA (US);
Abstract
A method, system, application programming interface, computer system and computer program product to provide locks for controlling access to data by nodes in a multi-node system while minimizing the number of messages sent between nodes. Locks can be grouped into blocks of locks, and exclusive access to data protected by locks in a block of locks can be granted together to a block agent for a particular node. The block agent handles requests for access to the data on behalf of clients running on the respective node. The block agent sends a message to a block master running on another node only when a request is made for access to data to which the block agent has not already obtained access. Access can be granted to a block agent for an entire block or for a portion of a block of locks.