SCI: ITR-(NHS+ASE)-(int+dmc): Dependable Grids

该提案通过一种方法解决了可靠网格领域的问题，该方法允许在存在仅限于覆盖选定类别故障的备用服务的情况下主网格服务的降级和故障场景。 这些服务将在自定义符号下开发和指定，允许定义和共享可靠性特征。 由此产生的生存网格实现将原型的基础上，基于OGSA的框架，使用现有的网格资源在UVA和NCSA.The工作承诺建立新的地面在分布式系统中的生存和可靠的服务的研究和开发，特别是新兴的基于Web服务的网格环境。 通过采用一种框架和方法，并在很大程度上通过创建一种新的语言，用于指定和共享服务之间的可靠性需求和特性（称为DESL），可行的和可靠的网格服务的概念可能会以原型的形式实现。 这一成就将对一类关键基础设施应用程序产生直接影响。 除了强大的研究生水平的学生参与，该项目还包括对本科生的重大支持和UVA少数民族项目办公室的直接参与。

This proposal addresses the area of dependable grids through an approach that allows for degradation and failure scenarios of primary grid services in the presence of alternate services restricted to covering selected classes of failures. These services will be developed and specified under a custom notation permitting dependability characteristics to be defined and shared. The resulting survivable grid implementation will be prototyped on a foundation of the OGSA-based framework using existing grid resources at UVA and NCSA.The work promises to forge new ground in the research and development of survivable and dependable services in distributed systems, specifically the emerging web service-based grid environment. By adopting a framework and methodology, and in large part through the creation of a new language for specifying and sharing dependability requirements and characteristics among services (called DESL), the concept of feasible and dependable grid services may come to fruition in prototype form. Such an accomplishment will have immediate impact on a class of critical infrastructure applications. In addition to strong graduate level student involvement, the project includes significant support for undergraduates and direct involvement of UVA's Office of Minority Programs.