Managing checkpoint queues in a multiple node system
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United States of America Patent
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Jun 20, 2006
Grant Date -
Jul 25, 2002
app pub date -
Mar 4, 2002
filing date -
Nov 24, 1998
priority date (Note) -
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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.
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