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:
Nov. 01, 2011
Filed:
Feb. 20, 2007
Sashikanth Chandrasekaran, Bellmont, CA (US);
Roger J. Bamford, Woodside, CA (US);
William H. Bridge, Alameda, CA (US);
David Brower, Alamo, CA (US);
Neil Macnaughton, Los Gatos, CA (US);
Wilson Wai Shun Chan, San Mateo, CA (US);
Vinay Srihari, San Francisco, CA (US);
Sashikanth Chandrasekaran, Bellmont, CA (US);
Roger J. Bamford, Woodside, CA (US);
William H. Bridge, Alameda, CA (US);
David Brower, Alamo, CA (US);
Neil MacNaughton, Los Gatos, CA (US);
Wilson Wai Shun Chan, San Mateo, CA (US);
Vinay Srihari, San Francisco, CA (US);
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
Techniques are provided for managing caches in a system with multiple caches that may contain different copies of the same data item. Specifically, techniques are provided for coordinating the write-to-disk operations performed on such data items to ensure that older versions of the data item are not written over newer versions, and to reduce the amount of processing required to recover after a failure. Various approaches are provided in which a master is used to coordinate with the multiple caches to cause a data item to be written to persistent storage. Techniques are also provided for managing checkpoints associated with the caches, where the checkpoints are used to determine the position at which to begin processing recovery logs in the event of a failure.