在移动环境中没有锁定的并发控制

S. A. Moiz, M. K. Nizamuddin
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引用次数: 18

摘要

在移动计算环境中,用户可以独立于其物理位置执行在线事务处理。在移动环境中,多个移动主机可能同时更新数据,从而导致数据不一致。传统技术使用锁的概念来实现移动环境中的并发控制。这在移动环境中可能不可行,因为带宽可变,频繁断开连接等。本文提出了一种无锁并发控制机制,该机制有助于减少通信开销,提高事务吞吐量。这样可以减少事务执行的等待时间,并且不会不必要地锁定资源。仿真结果说明了所提方法的性能权衡优势。
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Concurrency Control without Locking in Mobile Environments
In a mobile computing environment, users can perform on-line transaction processing independent of their physical location. In a mobile environment, multiple mobile hosts may update the data simultaneously which may result in inconsistency of data. The traditional techniques use the concept of locking for achieving the concurrency control in mobile environments. This may not be feasible in mobile environments due to variable bandwidth, frequent disconnections etc. In this paper we propose a lockless concurrency control mechanism which helps in reducing the communication overhead and enhances the transaction throughput. The waiting time for execution of the transaction is reduced and the resources are not unnecessarily locked. The simulation results specify the performance trade off benefits of the proposed approach.
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