锁定时间戳与锁定对象

M. Aguilera, Tudor David, R. Guerraoui, Junxiong Wang
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引用次数: 3

摘要

我们提出了多版本时间戳锁定(MVTL),这是一种针对可序列化事务的多版本并发控制算法。MVTL背后的关键思想很简单:锁定单个时间戳而不是锁定对象。在介绍了通用的MVTL算法之后,我们演示了MVTL的表达性:我们给出了几个简单的MVTL算法,通过提交以前的方案会中止的事务,通过避免串行中止或幽灵中止的问题,以及通过提供一种对不应该中止的事务进行优先级排序的方法,来解决当前多版本方案的局限性。我们给出的证据表明,在实践中,基于mbr的算法可以优于其他并发控制方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Locking Timestamps versus Locking Objects
We present multiversion timestamp locking (MVTL), a new genre of multiversion concurrency control algorithms for serializable transactions. The key idea behind MVTL is simple: lock individual timestamps instead of locking objects. After presenting a generic MVTL algorithm, we demonstrate MVTL's expressiveness: we give several simple MVTL algorithms that address limitations of current multiversion schemes, by committing transactions that previous schemes would abort, by avoiding the problems of serial aborts or ghost aborts, and by offering a way to prioritize transactions that should not be aborted. We give evidence that, in practice, MVTL-based algorithms can outperform alternative concurrency control schemes.
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