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

该提案通过一种方法解决可靠网格领域，该方法允许在存在仅限于覆盖选定故障类别的替代服务的情况下主要网格服务的降级和故障情况。这些服务将在允许定义和共享可靠性特征的定制符号下开发和指定。最终的可生存网格实现将在基于OGSA的框架的基础上建立原型，利用UVA和NCSA的现有网格资源。这项工作有望在分布式系统中可生存和可靠服务的研究和开发中开辟新的基础，特别是新兴的基于Web服务的网格环境。通过采用框架和方法，并在很大程度上通过创建一种用于在服务之间指定和共享可靠性需求和特征的新语言(称为DESL)，可行和可靠的网格服务的概念可能以原型形式实现。这样的成就将对一类关键基础设施应用程序产生立竿见影的影响。除了研究生水平的强烈参与外，该项目还包括对本科生的重大支持，以及弗吉尼亚大学少数族裔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.