Server side API for fencing cluster hosts via export access rights
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United States of America Patent
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Apr 7, 2009
Grant Date -
N/A
app pub date -
Jul 22, 2005
filing date -
Jul 22, 2005
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A method and system performs fencing techniques in a host cluster storage environment. A fencing application program interface resides in one or more storage systems. When a message is received by said storage system from a cluster member, the storage system in turn modifies the NFS export lists of one or more storage systems to restrict further access by the failed cluster node to otherwise fence the failed cluster node off from that storage system or from certain directories within that storage system. Prior to said access permission rights being changed, NFS operations are locked and drained, NFS locks are removed after which the export lists are modified. Once the fencing operations are performed, the NFS operations are served again by the storage system.
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