基于低耗费调度的网格数据库查询中间件的设计

Design of low-cost query middleware in grid database

网格数据库对其查询分解后的子查询的优化调度产生了新的要求,在分析了子查询与数据库节点的数据关联关系基础上,提出了一个基于低时间耗费评估模型的查询中间件(LCQM),给出了低耗费的查询调度计划算法,并给出了实验验证,提高了网格数据库查询的效率。

Grid Database is a new research area in Grid and Database. There is new requirement for query plan optimization in this area. This paper described the data relation between sub-query and database nodes, and gave a query middleware Low-Cost Query Middleware （LCQM） based on low-cost model. An algorithm of low-cost query plan was proposed. Expefimemal results demonstrate the enhanced efficiency of the query plan.