分布式查询优化的技术实现  

Technology That the Distributed Database is Inquired About and Optimized

作　　者：姜爱福[1] 李长云[1] 

机构地区：[1]湖南大学软件学院,湖南长沙410082

出　　处：《计算技术与自动化》2005年第1期72-73,98,共3页Computing Technology and Automation

摘　　要：针对分布式查询执行的全局处理策略进行优化的问题,从查询执行的效果出发,提出了一种通过统计的方式,不断从最近的查询执行代价学习纠正最近查询执行的统计代价的方法,为查询的全局处理提供参考,以达到优化执行、提高执行效率和速度的目的。This article concentrates on how to optimize the global query at an upper level: database-level distribution. Based on statistical methods, the optimizing algorithm try to find a light-loaded server that can process the query with less cost. In fact, it uses the historical records of previous execution. Then, according to some algorithm, the optimizing processor can determine which node among the system is the best to execute this query. The whole system is based on MYSQL, an open source database, which is widely used in Internet application.

关 键 词：分布式数据库 分布式查询代价 全局查询代价 代价统计 

分 类 号：TP311.13[自动化与计算机技术—计算机软件与理论]