CSR --- SMA: Reliability Modeling and Evaluation of Fault-Tolerant Hierarchical Computer Systems

CSR --- SMA：容错分层计算机系统的可靠性建模和评估

• 批准号: 0614652
• 负责人: Liudong Xing
• 金额: $ 4万
• 依托单位: University of Massachusetts, Dartmouth
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-06-15 至 2008-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0614652&HistoricalAwards=false
• 关键词: CSR; SMA; Reliability; Modeling; Evaluation

AbstractDue to the ever increasing system complexity, reliability modeling and analysis are becoming increasingly essential components in the design and tuning of fault-tolerant hierarchical computer systems. Tremendous research efforts have been expended in this area, but two practical issues, modular imperfect coverage (MIPC) resulted from imperfect recovery mechanisms and common-cause failures (CCF) arising from a shared root cause, have generally been missed or not been fully considered in existing computer system reliability models. Failure to model either of them accurately results in over/understated system reliability, which makes reliability analysis less effective in the design and tuning of computer systems. The primary goals of this project are to develop novel reliability models for fully describing MIPC and CCF, and to explore efficient model evaluation methods leading to more accurate analysis of hierarchical computer system reliability. This project involves three phases: model development, model evaluation, and the development of a reliability analysis software tool that applies the concepts and methods developed through this research. The new models and evaluation methods developed through this work are fundamental contributions to the body of knowledge on the computer system reliability. Research results from this project will support the design of reliable computer systems subject to MIPC and CCF. The PI will disseminate information and knowledge to the academic community and the industry through seminars, classroom materials, conference/journal publications, and an Internet website for the project.

摘要：由于系统复杂性不断增加，可靠性建模和分析正成为容错分层计算机系统设计和调整中越来越重要的组成部分。在这一领域已经投入了大量的研究工作，但是两个实际问题，即由不完善的恢复机制引起的模块化不完善覆盖（MIPC）和由共同根本原因引起的共因故障（CCF），在现有的计算机系统可靠性模型中通常被忽略或没有充分考虑。 未能准确地对其中任何一个进行建模都会导致高估/低估系统可靠性，这使得可靠性分析在计算机系统的设计和调整中效果不佳。该项目的主要目标是开发新颖的可靠性模型来充分描述 MIPC 和 CCF，并探索有效的模型评估方法，从而更准确地分析分层计算机系统的可靠性。该项目包括三个阶段：模型开发、模型评估以及应用本研究开发的概念和方法的可靠性分析软件工具的开发。通过这项工作开发的新模型和评估方法是对计算机系统可靠性知识体系的根本性贡献。该项目的研究成果将支持受 MIPC 和 CCF 约束的可靠计算机系统的设计。 PI 将通过研讨会、课堂材料、会议/期刊出版物以及项目的互联网网站向学术界和业界传播信息和知识。