Load sharing cluster file systems
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United States of America Patent
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May 15, 2012
Grant Date -
Aug 20, 2009
app pub date -
Nov 11, 2008
filing date -
Nov 12, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Load sharing clusters in which each node is responsible for one or more non-overlapping subset(s) of the cluster namespace and will process only those requests that access file or directory objects in the partitioned namespace that the node controls while redirecting requests designated for other nodes. A non-overlapping subset may be migrated from a source node to a destination node, for example, for load sharing or hotspot mitigation. Migration typically includes maintaining a file virtualization link from the destination node to the source node to permit forwarding of requests by the destination node to the source node during migration of metadata and then migration of data from the source node. After migration is complete, the file virtualization link is broken and the destination node services requests for the non-overlapping subset from the migrated metadata and data.
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