基于对象访问层优化JDO的持久对象查询

Optimizing Persistence Objects Query of Jdo Based on Objects Access Layer

JDO是Java环境中一种面向对象持久存储技术,通过在其持久实现的业务层与持久层之间增加对象访问层,对于业务查询可通过该层中索引对象解析成对对象ID的查询,以减少对象处理时间和磁盘IO次数,并通过模拟实验分析了不同过滤因子对查询效率的影响,证明了本方案在索引因子较小的情况下能节省磁盘访问时间。

JDO is a object-oriented persistence store technology in Java envirment. This paper puts forward a mothed that objects access layer can be introduced into business layer and persistence layer of persistence implements, so we can implements query from business layer by interpreting index objects as objectID, This can decrease the amount of the disk I/O access and the cost of operating object, and simulative experiments have analysized the effect of different index filter factor and proved this has a better performace when index filter factor is more small.