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:
Jan. 20, 2009
Filed:
Apr. 02, 2004
Karelle L. Cornwell, Campbell, CA (US);
Tanya Couch, San Jose, CA (US);
Robert W. Lyle, Morgan Hill, CA (US);
James Zu-chia Teng, San Jose, CA (US);
Julie A. Watts, Morgan Hill, CA (US);
Karelle L. Cornwell, Campbell, CA (US);
Tanya Couch, San Jose, CA (US);
Robert W. Lyle, Morgan Hill, CA (US);
James Zu-Chia Teng, San Jose, CA (US);
Julie A. Watts, Morgan Hill, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and system for controlling concurrency of access to data in a database system, includes: partitioning a table in the database system into a plurality of partitions; receiving a request for access to data; determining a partition of the plurality of partitions that contains the data; determining if the data has been committed; and if so, avoiding locking the partition in response to the request. By avoiding locking the partition when the data has been committed, the number of partition locks that need to be requested from a local resource lock manager is reduced, improving performance.