一种可靠性框图的异构系统可用性评价模型  

Availability evaluation model for the heterogeneous system based on RBD

作　　者：孙健[1] 张兴军[1] 董小社[1] 

机构地区：[1]西安交通大学电子与信息工程学院,陕西西安710049

出　　处：《西安电子科技大学学报》2016年第3期190-196,共7页Journal of Xidian University

基　　金：国家"863计划"资助项目(2008AA01A202)

摘　　要：针对异构系统内自治节点性能特征差异导致系统整体可用性评价困难的问题,提出一种采用可靠性框图的可用性评价模型.首先,分析系统异构性,从节点和任务角度对异构性进行分类,对资源异构性进行数学量化;然后,结合异构性分类构建串并行混联的异构系统可靠性框图可用性评价模型,并根据模型分析节点和整体异构系统的可用性度量方法.可用性评价以典型双节点和多节点异构系统为例,同时与马尔可夫过程可用性模型的评价结果进行比较,结果表明,文中所提模型能对异构系统可用性进行准确评价,可为研究异构系统可用性提升及高可用设计提供参考.In order to cope with difficulty of heterogeneous system availability evaluation caused by autonomous node performance and characteristic differences, the paper proposes an availability evaluation model based on the reliability block diagram （RBD）. First, we analyze and catalog system heterogeneity from the angle of nodes and tasks, and quantify resource heterogeneity. Then by heterogeneity classification, we build a serial and parallel mixed RBD availability evaluation model, and discuss the availability measurement method of nodes and the whole heterogeneous system. Availability evaluation takes the dual-computer and multi node heterogeneous system for example, and compares evaluation results with the Markov process availability model. Results show that the model we propose can evaluate the heterogeneous system with accuracy, and hence, provide references for research on availability improving and high-availability design of the heterogeneous system.

关 键 词：异构系统 可靠性框图 可用性 异构性 高可用 

分 类 号：TP302.7[自动化与计算机技术—计算机系统结构]