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Failure recovery in a parallel-processing database system

  • US 20040098371A1
  • Filed: 11/14/2002
  • Published: 05/20/2004
  • Est. Priority Date: 11/14/2002
  • Status: Active Grant
First Claim
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1. In a parallel-processing based database management system having a plurality of interconnected processing nodes, a method for recovering from a failure of a processing node, the method comprising:

  • storing, prior to failure of a first processing node, a database portion of the first processing node on a second processing node of the plurality of processing nodes;

    replacing the first processing node with a third processing node of the plurality of processing nodes when the first processing node fails;

    copying the database portion from the second processing node to the third processing node between database operations performed by the second processing node and the third processing node;

    performing, by the third processing node, database operations using the database portion stored on the second processing node until the copying of the database portion from the second processing node to the third processing node is completed; and

    performing, by the third processing node, database operations using the database portion stored at the third processing node when the copying of the database portion from the second processing node to the third processing node is completed.

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