集成TicToc与并行日志

Yasuhiro Nakamura, H. Kawashima, O. Tatebe
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引用次数: 1

摘要

事务系统由并发控制系统和恢复系统组成。TicToc是当今最先进的并发控制协议之一,但它缺乏恢复系统。研究了TicToc与回收系统的集成方法。为了提高效率,我们对回收系统采用了并行的提前写日志方案。有两种方法可以优化日志记录。第一个方法是提前锁释放,它在数据对象上提前执行锁释放。第二种方法是组提交,执行批量日志从内存传输到存储。我们集成了一个由TicToc和P-WAL日志系统组成的事务系统,假设内存是非易失性的。我们发现,当存储访问延迟与NVRAM相当时,这两种优化方法都会导致性能下降。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Integrating TicToc with Parallel Logging
A transactional system consists of a concurrency control system and a recovery system. TicToc is one of the state of the art concurrency control protocols today, but it lacks recovery system. We studied the ways to integrate TicToc and recovery system. For efficiency, we adopted a parallel write ahead logging scheme for the recovery system. There are two methods to optimize the logging. First method is early lock release which executes lock release early on data objects. Second method is group commit which executes batched logs transfer to storage from memory. We integrated a transactional system consisted by TicToc and P-WAL logging system assuming non-volatile memory. We found that the two optimization methods incur performance degradation when storage access latency is equivalent to that of NVRAM.
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