分布式数据库中选取半连序列新策略  

A New Strategy of Selecting Semi-join Sequences in Distributed Database

作　　者：林满山[1] 张昌昌[1] 宋威[1] 张娜[1] 

机构地区：[1]北方工业大学信息工程学院,北京100144

出　　处：《北方工业大学学报》2012年第1期8-13,19,共7页Journal of North China University of Technology

基　　金：国家自然科学基金项目(51075423);北京市属市管高等学校人才强教计划资助项目(PHR20100509;PHR201108057);北京市优秀人才培养资助项目(2009D005002000009)

摘　　要：传统选取半连序列只考虑压缩传输数据量,忽略了结点间网络传输因素的影响.为进一步优化分布式数据库系统执行跨结点任务的效率,本文加入权值矩阵对半连序列的选取进行改进,并以分布式原理为基础,基于半连序列采用java,以C/S模式设计实现了分布式数据库系统.对新的半连序列选取策略进行了验证.实验结果表明,改进后的算法在一定程度上提高了分布式数据库系统的性能.The conventional method of selecting semi-join sequence takes into account of compressing the transmission data quantum only, while neglecting the effect of network traffic between nodes. To further optimize the efficiency tern, this paper improves the strategy of selecting semi-join sequence by adding weight matrix, designs the system to validate the new strategy based on the semi-join sequence using java C/S mode, and the distributed principle. Experiment shows that the improved algorithm, to some extents, enhance the performance of the distributed database system.

关 键 词：分布式数据库 半连序列 权值矩阵 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]