【摘要】 可串行化的并发控制对传统应用是合适的。而在实时数据库中 ,为了满足事务定时限制 (典型地为截止期 ) ,并且考虑到局部的数据库不一致能够随下一次数据采样恢复 ,人们提出了准一致可串行化标准。本文基于这一标准提出了一种新的乐观并发控制协议 ,它考虑了数据的相似性及事务特点 ,提高了事务执行的并发度 ,有利于实时事务定时限制的满足更多还原

【Abstract】 Serializable concurrency control protocols are unsuitable for real-time database systems.In a real-time database system,the local inconsistency will come back to consistency by the next sampling.So the quasi-consistent serializabe criterion is proposed.In this paper,we propose a new concurrency control method based on quasi-consistent serializabe criterion and optimistic mechanism,which can improve the concurrency of real-time transaction execution and help to meet the deadlines of real-time transactions.更多还原