Efficient fail-over in replicated systems
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United States of America Patent
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May 3, 2016
Grant Date -
Jul 2, 2015
app pub date -
Jan 1, 2014
filing date -
Jan 1, 2014
priority date (Note) -
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Abstract
A method for selecting a leader node among a plurality of network nodes, comprising: providing a current configuration of selected nodes in replicated state machine based system, wherein a first node is set for handling commands received from clients; executing a consensus protocol by the selected nodes under the current configuration; identifying at least one fault indicative event of the first node; calculating a suggested configuration of selected nodes, wherein a second node is set for handling the commands; informing each member of the suggested configuration and the first node of the suggested configuration; executing the consensus protocol in parallel under both the suggested configuration and the current configuration; and when detecting that the first node is faulty, setting the second node for handling the commands under the current configuration in place of the first node and reconfiguring the current configuration to become the suggested configuration.
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