An Efficient Real-time Scheduler for Nested Transaction Models

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ICPADS '02 Proceedings of the 9th International Conference on Parallel and Distributed Systems
Year:
2002

Citing 0
Cited 3

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Abstract

Nested transaction models have been widelyadopted in many advanced database applications,such as telecommunications and real-time trafficinformation systems. However, noticeable studiesfocus on scheduling flat transactions for the currentresearch of distributed real-time database systems(RTDBS). This paper presents an efficient real-timescheduler consisting of (1) a priority assignmentpolicy called FHRN to schedule real-time nestedtransactions, and (2) a lock mechanism called2PL-HPN to resolve the data conflict problemamong nested transactions for distributed RTDBSusing nested transaction models. The simulationresult shows that the FHRN outperforms currentpriority assignment policies such as ED, HV andHRU.