自恢复容错系统的建模与分析  

Modeling and Analysis of Fault-tolerant System With Rejuvenation

作　　者：郭成昊[1] 刘凤玉[1] 

机构地区：[1]南京理工大学计算机科学与技术系,南京210094

出　　处：《中国工程科学》2007年第10期75-79,共5页Strategic Study of CAE

基　　金：国家自然科学基金(60273035)

摘　　要：容错系统不仅会产生硬件故障,由于连续长时间的运行,系统的性能也会逐渐下降或失效,即老化现象。综合考虑容错系统中的硬件故障和老化现象,提出了将传统的冗余技术和软件抗衰技术相结合的策略,并给出了该系统的非马尔可夫随机Petri网模型,随之对基于该模型的系统进行了定量分析。A fault-tolerant system experiences a crash due to hardware components＇ faults performance degradation as an ＂aging＂ phenomenon, because of running continuously for very long periods. This paper considers both hardware components＇ faults and ＂ aging＂ phenomenon, proposes composing structure and rejuvenation schedule in the fault-tolerant system, formalizes the system with Non-Markovian Petri nets, and evaluates quantitatively the performance of a system based on this model.

关 键 词：容错系统 软件抗衰 软件老化 冗余策略 非马尔可夫随机PETRI网 

分 类 号：TP302[自动化与计算机技术—计算机系统结构]