Invention Grant
- Patent Title: Methods to perform disk writes in a distributed shared disk system needing consistency across failures
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Application No.: US11708857Application Date: 2007-02-20
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Publication No.: US07930278B2Publication Date: 2011-04-19
- Inventor: Sashikanth Chandrasekaran , Roger J. Bamford , William H. Bridge , David Brower , Neil Macnaughton , Wilson Wai Shun Chan , Vinay Srihari
- Applicant: Sashikanth Chandrasekaran , Roger J. Bamford , William H. Bridge , David Brower , Neil Macnaughton , Wilson Wai Shun Chan , Vinay Srihari
- Applicant Address: US CA Redwood Shores
- Assignee: Oracle International Corporation
- Current Assignee: Oracle International Corporation
- Current Assignee Address: US CA Redwood Shores
- Agency: Hickman Palermo Truong & Becker LLP
- Main IPC: G06F17/00
- IPC: G06F17/00 ; G06F7/00 ; G06F13/00

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.
Public/Granted literature
- US20070174541A1 Methods to perform disk writes in a distributed shared disk system needing consistency across failures Public/Granted day:2007-07-26
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