摘要
封锁机制在面向DaaS的XML数据库事务处理中有十分重要的作用,现有的封锁机制由于封锁粒度太大、不支持主流XML查询语言等因素,存在需要改进的空间。本文探讨了一种面向DaaS的XML数据库分布式封锁机制,在每个数据库节点上实现了一个基于模式树视图的细粒度语义锁,在全局节点上通过构建全局模式树视图来协调各节点的事务处理,最后比较了本文封锁机制与现有封锁机制的优缺点。
Locking mechanism plays a key role in transaction processing of DaaS based on XML databases. Traditional research on locking mechanism has many limitations, such as poor concurrency ability, and do not support main query language such as XQuery. This paper proposes a multi-granular locking mechanism, it creates semantic locks on the nodes of dynamic pattern tree view for every database node, and manages the transaction coordination of different databases with the global pattern tree view of the main database node. A discussion about the differences between the locking mechanisms of this paper and current are proposed in the last of the paper.
出处
《电信科学》
北大核心
2012年第1期47-52,共6页
Telecommunications Science
基金
国家自然科学基金资助项目(No.60803160)
湖北省自然科学基金重点计划基金资助项目(No.2009CDA136)
湖北省教育厅科研基金资助项目(No.Q20101110)
武汉市科技攻关计划基金资助项目(No.20110821225
No.20110821236)
中国博士后科研基金资助项目(No.20060400275)
江苏省博士后科研基金资助项目(No.0601009B)
关键词
模式树
语义锁
事务协调
pattern tree, semantic lock, transaction coordinator
