Methods and systems for detecting data divergence and inconsistency across replicas of data within a shared-nothing distributed database
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United States of America Patent
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Mar 21, 2017
Grant Date -
Mar 12, 2015
app pub date -
Sep 8, 2014
filing date -
Sep 9, 2013
priority date (Note) -
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Abstract
Methods and systems are disclosed for detecting data divergence or inconsistency across replicas of data maintained in replica nodes in a shared-nothing distributed computer database system. The replica nodes communicate with a coordinator node over a computer network. The method includes the steps of: (a) receiving an operation at the coordinator node; (b) transmitting the operation to the replica nodes to be executed by each replica node to generate an operation result and a hash representation of the operation or of the operation result; (c) receiving the operation result and the hash representation generated by each of the replica nodes; and (d) determining whether the operation resulted in data divergence or inconsistency by detecting when the hash representations received from the replica nodes are not all the same.
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