一种自适应多版本实时事务并发控制新方法:AMVCC

An adaptive multi-version concurrency control method for real-time transactions:AMVCC

鉴于传统的基于锁的并发控制机制重点考虑数据的一致性和事务的并发度,不能很好地满足实时数据库系统对时态一致性的要求,结合封锁、多版本和有效性确认等并发控制机制,提出了一种并发控制的新方法——自适应多版本实时事务并发控制方法:AMVCC.该方法根据具体情况自适应地采用不同的并发控制机制,以提高事务的并发度和截止时间内完成事务的数量.可行性分析结果表明此方法在性能上优于传统并发控制方法.

In view of the traditional lock-based concurrency control mechanism emphasizes the data consis- tency and the concurrency performance,it did not primely maintain the demand for the temporal consistency of the real-time database system. A new concurrency control method for real-time transactions-adaptive multi-version concurrency control method（AMVCC） was presented, which was based on the locking, multiversion and validity confirmation. This method could adopt the different concurrency control mechanism according to the idiographic situation and increased the amount of the transactions which is completed within the deadline. The feasibility analysis denoted that AMVCC was better than the traditional concurrency control method on performance.