基于服务的虚拟关系引擎的研究与实现.pdf

摘 要

织女星信息网格采用计算机系统结构的研究方法，将网格看成一台虚拟的计
算机平台，解决信息共享的共性需求和功能。完全基于关系的信息网格资源空间
模型——REVP 模型着力解决如何消除信息孤岛、实现单一信息源的问题。基于服
务的虚拟关系引擎是以该模型的虚拟层为依托，连通有效层和物理层的软件结构。
它的工作主要是根据有效关系的地址，解析出其所引用的底层关系的信息，找到
物理数据源；根据有效层传入的参数，解析出物理层能够理解并执行的操作；采
用有利于引擎寻址的虚拟关系的组织和管理模式。基于服务的虚拟关系引擎支持
schema 的在线变更、创建和删除，实现了用户应用和底层资源之间的动态绑定。
它提供了根据有效关系的地址直接访问物理关系的功能，支持对有效关系、虚拟
关系和物理关系元信息的操作，支持对有效关系、虚拟关系和物理关系数据信息
的操作，支持有效关系、虚拟关系和物理关系的创建、删除等操作。基于服务的
虚拟关系引擎已经成功应用到中国科学院计算技术研究所所务平台。









关键词 信息网格资源空间模型；虚拟关系引擎；虚拟关系；信息网格；











I
Research and implementation of Virtual Relation Engine based on
Web Services
abstract
Research method of Vega Information Grid (VIG)is similar to that of the computer
takes the VIG as a virtual machine,provides the common need and func
-tion of information sharing .The REVP resource model is presented to eliminate info-
rmation isolated island and meet the request of single information Rela-
tion Engine based on Web Services connects effective layer and physical layer with the
help of virtual layer. The contribution of the thesis can be concluded into the following
aspects. Firstly, it gets the information of bottom relation by analyzing the address of the
Effective relation then finding out the physical , It according to the
parameter from effective layer give the instruct. which the physical layer can understand
, it takes the managing model which is advantegeous to search the
Relation Engine allows the online modification ,deletion and creation
of the schema. It also allows that the application of user dynamically bind the bottom
makes user access the physical relation through the virtual relation .It allows
the operation on the schema of effective