Device for controlling multiple transactions contending concurre

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3642815, 3642816, G06F 1200, G06F 1516

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active

053773519

ABSTRACT:
A database processor in a distributed database system has a decision making section for use in detecting whether a distributed deadlock has occurred if a contention is detected by a contention detector. If a distributed deadlock occurs, the decision making section posts or provides a concurrency controller with information regarding the detection of the distributed deadlock, whose occurrence has been detected by a global deadlock detector on a network to which the database processor is connected. The concurrency controller instructs a transaction controller to cancel the queuing of the transaction forming the distributed deadlock. The transaction controller can then take prescribed controlling actions to swiftly resolve the distributed deadlock.

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patent: 5175852 (1992-12-01), Johnson et al.
Knapp, "Deadlock Detection in Distributed Databases", ACM Computing Surveys, vol. 19, No. 4, Dec. 1987, pp. 303-315.

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