网格计算环境若干问题解析

网格计算环境泛指网格计算与编程环境。它是“允许用户以简单的方式访问网格资源与应用的工具集及技术”。网格计算环境可根据所采用的技术进行分类，但选择方法、确定分类的关键是能够使系统具有更好的自定义、持久和易用等特性，不会对系统的整体性能带来负面影响。网格计算环境的主要特点在于对分布式基本组件的处理、编程模型、安全、数据管理、工具扩充、其他高级工具的选择、利用以及用户接口等。构建网格计算环境的关键技术有：网格门户开发工具包、Java商品化网格工具箱、通知／事件服务等。网格计算环境的计算模型有多个，包括MPI、Legion、XCAT等。他们都支持元数据及网格对象的包装。

Discussion on several questions of grid computing environment

Grid computing environment generally refers to grid computing environment and programming environment. It is ＂grid set of tools and technology allowing users to access grid resources and the application of in a simple way. ＂ Grid computing environment can be classified by the technology which is used, but the key of the choosing method and making sure classification is to make the system has better self-definition, durability and easy-to-use features, and do not have a negative impact on overall performance of the system. The main characteristics of grid computing environment are on the processing to the distributed basic components, programming model, security, data management, tools expansion, choice and using of other advanced tools, as well as user interfaces. The key technology to construct the grid computing environment is： Grid Portal Development Kit, Java commercialization Grid Toolbox, notification/event services. Grid computing environment has several computing models, including MPI, Legion, and XCAT, which all support the packaging of metadata and grid objects.