Relocation of metadata server with outstanding DMAPI requests
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United States of America Patent
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Aug 30, 2011
Grant Date -
Jan 20, 2005
app pub date -
Jul 17, 2003
filing date -
Jun 5, 2001
priority date (Note) -
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Abstract
A cluster of computer system nodes share direct read/write access to storage devices via a storage area network using a cluster filesystem and operating system implementing DMAPI. Threads executing on a metadata client know when a DMAPI event is required, and generate the DMAPI event on their own initiative when necessary. A metadata server maintains DMAPI queues. If the metadata server relocates to another host, the DMAPI events in the DMAPI queues are moved transparently to users.
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