Providing local cache coherency in a shared storage environment
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United States of America Patent
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Nov 22, 2016
Issued Date -
N/A
app pub date -
Mar 15, 2013
filing date -
Mar 15, 2013
priority date (Note) -
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Abstract
Multiple nodes of a cluster have associated non-shared, local caches, used to cache shared storage content. Each local cache is accessible only to the node with which it is associated, whereas the cluster-level shared storage is accessible by any of the nodes. Attempts to access the shared storage by the nodes of the cluster are monitored. Information is tracked concerning the current statuses of the local caches of the nodes of the cluster. Current tracked local cache status information is maintained, and stored such that it is accessible by the multiple nodes of the cluster. The current tracked local cache status information is used in conjunction with the caching functionality to determine whether specific nodes of the cluster are to access their local caches or the shared storage to obtain data corresponding to specific regions of the shared storage.
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