分布式实时数据库系统的事务管理  

Research on the Transaction Management for Distributed Real-time Database Systems

作　　者：熊燕群[1] 白似雪[2] 李进京[1] 

机构地区：[1]上海理工大学计算机应用技术系,上海200093 [2]南昌大学计算机科学技术系,江西南昌330031

出　　处：《南昌大学学报（理科版）》2008年第3期290-294,共5页Journal of Nanchang University(Natural Science)

基　　金：江西省教育厅计划资助项目(赣教计字2006[36])

摘　　要：在分布式实时数据库系统中,事务管理一方面要保证事务的定时限制,另一方面又要保证分布式事务的全局可串行化和各子事务的局部可串行化。因此,在这种特殊的环境下,传统的分布式事务管理机制已不再适用。从一个全新的角度出发,针对事务的整个生命期进行研究,对事务管理机制中的并发控制和提交处理这两个重要环节进行综合考虑,研究影响实时性能的因素和相应的解决方法,并以提高系统实时性为目标对传统协议进行了改进。从而使事务管理在采用这一整套改进的协议后,能够很好地胜任于分布式实时环境。In the Distributed real -time database System, on one hand, transaction management has to ensure the transactions＇ timing constraint. On the other hand, it must ensure the global serialization of distributed transactions and the local serialization of each child transaction. So in the special environment, the conventional distributed trans- action management mechanism has been inapplicable. This paper will start from a new standpoint, which makes a study on the whole transaction lifetime. It synthetically considers the concurrency control and the committing process in transaction management,finds the factors affecting the real -time performance and the corresponding solutions, and improves the conventional protocols for enhancing systems＇ real - time performance. These entire make the set of new mechanisms adequate to the transaction management in distributed real -time environment.

关 键 词：分布式实时数据库系统 两阶段锁定协议 两阶段提交协议 

分 类 号：TP311.133.1[自动化与计算机技术—计算机软件与理论]