【摘要】 针对分布式数据库的并发控制提出了一种新算法 .本算法根据新事务与本地节点上已启动但还未完成事务的信息进行比较 ,动态地在一种称为 EWP的乐观并发控制算法与一种称为 PSL的悲观并发控制算法之中选择一种算法来实现对该新事务的并发控制 .本算法是在文中提出的 EWL算法的基础上修改而成的 ,它比原来的 EWL算法具有更强的自适应性更多还原

【Abstract】 This paper presents a new algorithm which is useful to concurrency control of distributed database system.The new algorithm is realized by selecting dynamically between optimistic algorithm which is named EWP and pessimistic algorithm which is named PSL,according to the result of comparing a new management with unfinished managements in local site. The new algorithm is finished by amending the EWL algorithm presented in thispaper,and it has more self adaptability than the EWL.更多还原