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. 05, 2011
Filed:
Jun. 09, 2006
Eugene Ho, San Ramon, CA (US);
Kotaro Ono, Foster City, CA (US);
Neil Macnaughton, Los Gatos, CA (US);
Michael Zoll, Mountain View, CA (US);
Herbert Van Den Bergh, Los Altos, CA (US);
Eugene Ho, San Ramon, CA (US);
Kotaro Ono, Foster City, CA (US);
Neil Macnaughton, Los Gatos, CA (US);
Michael Zoll, Mountain View, CA (US);
Herbert van den Bergh, Los Altos, CA (US);
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
Methods and apparatuses for providing access to data in a cluster database are described. Embodiments of the invention include identifying situations in which many nodes require relatively equal access to a data block, and taking appropriate measures to improve the performance of the system in these situations. For example, a node may automatically downgrade its lock from an X lock to an S lock as soon as it has finished a modification of the data. S locks are sent to other nodes in the system as soon as a modification is complete. Modifications to the data are also sent to other nodes in the system as soon as a modification is complete. Depending on the size of the data modification, the entire data block may be sent, or only the modifications to the data may be sent.