Managing global cache coherency in a distributed shared caching for clustered file systems
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United States of America Patent
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Mar 14, 2017
Grant Date -
Jul 21, 2016
app pub date -
Jan 19, 2016
filing date -
Aug 25, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
Various embodiments are provided for managing a global cache coherency in a distributed shared caching for a clustered file system (CFS). The CFS manages access permissions to an entire space of data segments by using the DSM module. In response to receiving a request to access one of the data segments, a calculation operation is performed for obtaining most recent contents of one of the data segments. The calculation operation performs one of providing the most recent contents via communication with a remote DSM module which obtains the one of the data segments from an associated external cache memory, instructing by the DSM module to read from storage the one of the data segments, and determining that any existing contents of the one of the data segments in the local external cache are the most recent contents.
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