增量预取技术在持久化框架中的研究与实现  

The Research and Implement of Increasing Prefetching in Persistent Framework

作　　者：张美玲[1] 张春海[1] 仲晓芳[1] 

机构地区：[1]中国海洋大学信息科学与信息学院,山东青岛266000

出　　处：《微计算机信息》2010年第18期160-161,127,共3页Control & Automation

摘　　要：ORM(Object-Relational Mapping)框架是解决对象与关系数据不匹配的有效方案,但是ORM并非很完美,复杂对象的映射和查询,对系统性能造成了很大的影响。本文根据控制流程图实现对象的预取,每次预取关键点之间的对象,这种增量预取方式,保证预取到的对象都是有效的,同时减少了与数据库的交互操作。最后介绍了增量预取技术在持久化框架中的实现。ORM framework is the effective solution to the object and relational data does not match in the system, but the ORM is not perfect, complex object mapping and inquiries, increase the interaction between the clients and the the database.In this paper, via the control flow chart to achieve the object prefetch, pretch the objects between the prefetch key point and the next preteh key point everytime, the incremental prefetching methods to ensure that the target of prefetching is effective.This can reduce interact with the database. Furthermore, a pi＇ototype implementation of this algorithm in the persistent framework.

关 键 词：复杂对象 对象预取 持久化框架 查询优化 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]