一种云计算环境下的XML查询数据服务的优化方法

An optimization method for XML query data service in cloud environment

在云计算环境中提供数据服务逐渐成为研究热点。在云计算环境中结合已有XQuery查询处理引擎,实现了云计算环境中XML数据查询服务。为提高云计算环境中XML数据查询效率,采用基于XPath投影的方法预先对XML分块处理,仅保留与XQuery语句相关的数据。实验表明,该方法有效缩小了数据分块的规模,缩短了XML数据服务的查询处理时间。

Providing XML data service in could environment attracts more and more attentions. By introducing existed XQuery engine （such as saxon） into cloud environment, a XML data query service framework was implemented. To improve the efficiency of XML data query in cloud environment, an op- timization method based of XPath projection is applied in the procedure of splitting XML data, only leav- ing the data related to XQuery statements. Experiments show that the optimization method effectively reduces both the data size and the query processing time of XML data service.