XML数据库并发控制机制的研究  

Research on Concurrency Control Mechanism for XML Databases

作　　者：刘波[1] 张春海[1] 李华[1] 

机构地区：[1]中国海洋大学计算机科学系,青岛266071

出　　处：《计算机工程与应用》2005年第21期198-201,205,共5页Computer Engineering and Applications

摘　　要：并发控制是改善数据库系统事务性能的最重要的机制,多用户事务并发问题在XML原型数据库领域是一个难点。通过一种类XPath数据模型,定义基于此模型的几种XML数据库操作。在此基础上,提出一种基于XPath的锁协议(XPL)以及锁模型,并验证在此锁协议机制下的调度是可串行性调度,从而实现了XML原型数据库的多用户事务并发控制。最后通过实验对XPL协议的并发性能进行测试和分析。Concurrency control is the most important way of improving the transaction capability of database system.And multiple-users concurrency transaction is also a difficulty in the field of Native XML Databases.In this paper,some kinds of XML Database operations based on the pseudo XPath Data Model are proposed.On the basis of this,an XPath-based Locking protocol(XPL),as well as a lock mode,is put forward and then the schedule within the locking protocol mentioned above is proved to be serializability.As a result,the Multiple-users concurrency transaction for Native XML Databases can be realized.The detailed performance evaluation results obtained by using typical experiments are also given to analyze the capability of concurrency for XPL protocol.

关 键 词：XML原型数据库 并发控制 可串行性 事务 锁协议 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]