东南大学学报（英文版）2018，Vol.34Issue(2)：187-190,4.DOI:10.3969/j.issn.1003-7985.2018.02.007
基于比例风险模型的Web服务器集群系统可靠性分析
Reliability analysis of web server cluster systems based on proportional hazards model
摘要
Abstract
An approach for web server cluster ( WSC ) reliability and degradation process analysis is proposed. The reliability process is modeled as a non-homogeneous Markov process ( NHMH ) composed of several non-homogeneous Poisson processes ( NHPPs) . The arrival rate of each NHPP corresponds to the system software failure rate which is expressed using Cox’s proportional hazards model ( PHM) in terms of the cumulative and instantaneous load of the software. The cumulative load refers to software cumulative execution time, and the instantaneous load denotes the rate that the users’ requests arrive at a server. The result of reliability analysis is a time-varying reliability and degradation process over the WSC lifetime. Finally, the evaluation experiment shows the effectiveness of the proposed approach.关键词
web服务器集群/负载共享/比例风险模型/可靠性/软件老化Key words
web server cluster/load-sharing/proportional hazards model/reliability/software aging分类
信息技术与安全科学引用本文复制引用
侯春燕,王劲松,陈晨..基于比例风险模型的Web服务器集群系统可靠性分析[J].东南大学学报（英文版）,2018,34(2):187-190,4.基金项目
The National Natural Science Foundation of China ( No. 61402333, 61402242) , the National Science Foundation of Tianjin ( No. 15JCQNJC00400) . （ No. 61402333, 61402242）
