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Priority-based speculative locking protocols for distributed real-time database systems.

机译:分布式实时数据库系统的基于优先级的推测性锁定协议。

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摘要

In recent years, a number of concurrency control protocols have been proposed to improve performance within Distributed Real Time Database Systems. Speculative Locking (SL) allows parallelism and execution of multiple instances of conflicting transactions to improve performance in Distributed Database Systems. This research extends SL by proposing two concurrency control protocols: Preemptive Speculative Locking (PSL), and Priority Inheritance Speculative Locking (PiSL). PSL allows preemption and abortion of lower priority transactions when conflict occurs, whereas PiSL allows the lower priority transaction to inherit the priority of the blocked transaction and continue execution. Using a distributed real-time transaction processing simulator that supports nested transaction model, an extensive set of experiments have been conducted which demonstrate that both PSL and PiSL outperform SL. Among the two proposed protocols, PSL performs better when data contention and system load are high. The performance metrics include number of transactions that meet their deadlines, and resource utilization.
机译:近年来,已经提出了许多并发控制协议来提高分布式实时数据库系统内的性能。推测锁定(SL)允许并行处理和执行冲突事务的多个实例,以提高分布式数据库系统中的性能。这项研究通过提出两种并发控制协议来扩展SL,即:先发性推测性锁定(PSL)和优先级继承推测性锁定(PiSL)。 PSL允许在发生冲突时抢占和放弃优先级较低的事务,而PiSL则允许优先级较低的事务继承被阻塞事务的优先级并继续执行。使用支持嵌套事务模型的分布式实时事务处理模拟器,已进行了广泛的实验,这些实验证明PSL和PiSL均优于SL。在这两个提议的协议中,当数据争用和系统负载较高时,PSL的性能更好。性能指标包括在截止日期之前完成的事务数量以及资源利用率。

著录项

  • 作者

    Bambi, Jonas Y.;

  • 作者单位

    University of Northern British Columbia (Canada).;

  • 授予单位 University of Northern British Columbia (Canada).;
  • 学科 Computer Science.
  • 学位 M.Sc.
  • 年度 2009
  • 页码 107 p.
  • 总页数 107
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自动化技术、计算机技术;
  • 关键词

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