校园网格环境下异构数据库的集成与分布式查询  

Heterogeneous Database Integration and Query in CDGE

作　　者：蔡红云[1] 张建勋[2] 田俊峰[1] 何欣枫[1] 

机构地区：[1]河北大学数学与计算机学院,河北保定071002 [2]天津中医药大学网络信息中心,天津300193

出　　处：《广西师范大学学报（自然科学版）》2007年第4期298-301,共4页Journal of Guangxi Normal University:Natural Science Edition

基　　金：河北省自然科学基金资助项目(F2004000133);河北省教育厅2004年科研计划基金资助项目(4213530)

摘　　要：针对校园数据网格的分布式异构数据库环境,提出了一种基于网格服务的异构数据库访问和集成方法。该系统为用户提供一致的虚拟数据视图和分布式数据查询支持。在分析和研究现有分布式数据库查询技术的基础上,介绍了一种适用于网格环境下海量数据的连接操作算法,算法依据分布式数据库的固有并行性,利用数据划分来提高查询的并行处理程度,以改进响应时间。理论分析表明,该算法在减少网络通信开销和降低响应时间方面具有较好的性能。Focusing on distributed, heterogeneous database environment of college data grid, based on the grid service, a method on database access and integration is presented. A uniform virtual data view is provided for the user and distributed query is supported. Based on the analysis and research of the present distributed query technology, a join algorithm of massive data, which adapts to grid environment, is introduced. According to the intrinsic parallelism of distributed query, by using data partition, higher parallelism degree can be achieved and response time can be improved. The theoretical analysis shows that the algorithm achieves better performance in decreasing network transmission cost and minimizing the response time.

关 键 词：分布式查询 数据网格 数据库集成 连接操作 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]