CMM :Credential Migration Management system based on trusted computing in CGSP

In grid computing environment, grid users often need to authorize remote computers acting as original users’ identity. But the original user may be under the risk of information leakage and identity abused for sending his credential to remote computing environment. Existing grid security practice has few means to enforce the security of credential delivery. Trusted Computing (TC) technology can be added to grid computing environment to enhance the grid security. With TC using an essential in-platform (trusted) third party, Trusted Platform Module (TPM), we can use TC to protect the user credential. In this paper we present credential migration management (CMM) system, which is a part of Daonity project, to manifest migrating credential in security between different computers with TPM.     

CFD网格应用平台研究

CFD网格应用平台是ChinaGrid5大应用平台之一,它为各种不同的CFD应用提供了网格基础设施。平台采用了两层架构：上层基于WSRF服务,下层基于并行计算。为了无缝整合各种CFD应用,平台定义了一组包括CFD工作流模板和CFD分类码的重要概念,使用了一系列如CGNS数据可视化工具GVisual的关键技术。目前基于Service Domain的平台原型系统已经开发完成,性能测试表明CFD应用移植其到平台上后性能获得提高。     

面向多自治域网格的信息服务模型及其实现

网格是实现分布异构资源共享的有效模式,而信息服务实现系统服务与资源的有效管理,是网格系统的重要组成部分.ChinaGrid是由多个自治域组成的大规模网格,现有的信息服务不能满足此类系统特性与应用需求.文中提出网格信息服务体系GISA2.0,强化了域自治管理和资源信息的安全性.GISA2.0实现了可扩展的网格信息模型和面向服务、支持多种监控信息聚集的层次化信息管理框架.提出了基于分布XPath引擎的多域资源信息检索机制,实现了安全、快速和用户相关的虚拟全局资源视图.     

ChinaGrid中XML解析方式设计

中国教育科研网(ChinaGrid)采用XML表示、交换和存储网格信息,具有种类多、信息量大等特点。常用解析方式（如DOM、SAX等）针对大型文档解析时,速度慢或占用大量系统资源。该文设计并实现了基于索引的解析方式,通过构造索引表加速信息查询和减少内存占用,具有快速、健壮以及占用系统资源少的特点,适应于大规模网格信息的解析。目前已应用在ChinaGrid的信息服务中,测试结果证明了其有效性。     

Grid Computing in China

Grid computing presents a new trend to distributed computation and Internet applications, which can construct a virtual single image of heterogeneous resources, provide uniform application interface and integrate widespread computational resources into super, ubiquitous and transparent aggregation. In the adoption of Grid computing, China, who is facing more resource heterogeneity and other specific demands, has put much effort on both research and practical utilization. In this paper, we introduce the major China Grid research projects and their perspective applications. First we give the overview of the four government-sponsored programs in Grid, namely the China National Grid, ChinaGrid, NSFC Grid, and ShanghaiGrid. Then we present six representative ongoing Grid systems in details, which are categorized into Grid middleware and Grid application. This paper provides the general picture of Grid computing in China, and shows the great efforts, devotion and confidence in China to use Grid technology to boost the society, economics and scientific research.