Failover system and method for cluster environment
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United States of America Patent
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Jul 26, 2005
Grant Date -
Mar 13, 2003
app pub date -
Aug 9, 2001
filing date -
Aug 9, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A failover method and system is provided for a computer system having at least three nodes operating as a cluster. One method includes the steps of detecting failure of one node, determining the weight of at least two surviving nodes, and assigning a failover node based on the determined weights of the surviving nodes. Another method includes the steps detecting failure of one node and determining the time of failure, and assigning a failover node based in part on the determined time of failure. This method may also include the steps of determining a time period during which nodes in the cluster are heavily utilized, and assigning a failover node that is not heavily utilized during that time period.
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