Replicating data across multiple copies of a table in a database system

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United States of America Patent

PATENT NO 9652519
SERIAL NO

14977806

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Abstract

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A mechanism is provided for handling transaction messages in asynchronous data replication in a database system, in which the database system includes a source node and a target node, and each transaction message has information concerning a row change to a table copy at the source node. The mechanism determines whether a first transaction message has a dependency on a preceding non-completed transaction message. Responsive to the first transaction message having a dependency on the preceding non-completed transaction, the mechanism holds the first transaction message, completes the preceding non-completed transaction message including applying the row change associated with the preceding non-completed transaction message to the table copy at the target node, and responsive to completing the preceding non-completed transaction message, and releases the first transaction message and applying the row change associated with the first transaction message to the table copy at the target node.

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Patent Owner(s)

  • INTERNATIONAL BUSINESS MACHINES CORPORATION

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bourbonnais, Serge Palo Alto, US 59 1378
Hamel, Elizabeth B Morgan Hill, US 11 691
Lindsay, Bruce G San Jose, US 32 2414
Todd, Stephen J Winchester, GB 234 4556

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