標題: An analytic model for performance analysis of concurrency control strategies in mobile environments
作者: Chen, GC
Lee, SY
資訊工程學系
Department of Computer Science
公開日期: 1-Jan-1999
摘要: Many performance studies have shown that locking based protocols outperform other concurrency control protocols in most database configurations and workloads. However, in mobile environments there are many special characteristics, such as long network delay and the expensive wireless communication. Besides, transactions may be aborted:due to forced termination when handoff occurs for the consideration of concurrency control. The performances of concurrency control strategies should be re-evaluated in such environments, In this paper, we develop an analytic model to evaluate the performances of concurrency control strategies. The accuracy of this model is verified by simulation. According to the experimental results we show that the behavior of mobile users and the degree of data contention have a significant impact on the relative performances of the concurrency control strategies. In particular, we point out that the optimistic concurrency control strategy outperforms other strategies over a wide range of system configurations. We also explain why the optimistic algorithm is well suited in mobile environments.
URI: http://hdl.handle.net/11536/31651
ISSN: 0010-4620
期刊: COMPUTER JOURNAL
Volume: 42
Issue: 6
起始頁: 511
結束頁: 521
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