基于SANs模型的一种并行I／O系统的可用性评估  

Availability evaluation based on SANs model for a parallel I/O system

作　　者：郑霄[1,2] 李宏亮[3] 郑方[3] 郑翔[3] 陈左宁[3] 

机构地区：[1]解放军信息工程大学 [2]江南计算技术研究所,江苏无锡214083 [3]江南计算技术研究所

出　　处：《计算机工程与应用》2008年第19期67-71,83,共6页Computer Engineering and Applications

基　　金：国家高技术研究发展计划(863)(the National High-Tech Research and Development Plan of China under Grant No.2007AA01Z117);博士后基金(20060390963)

摘　　要：并行I/O系统是高性能计算机系统的一个重要组成部分,其可用性水平对整机系统性能的发挥具有重要作用。采用SANs(Stochastic Activity Networks,随机行为网)模型及其支持工具Mobius,对一种大规模并行I/O系统建立可用性评估模型,并采用模拟方法进行解析。模拟结果反映了全局文件系统数量、单一文件系统内最小可用OST(Object Storage Target,对象存储目标)数量和系统维修时间等参数的变化对全系统可用度的影响,对于大规模并行I/O系统的设计与维护具有积极的参考价值。The parallel I/O system is one of important components of a HPC system,and it can discount the performance of the whole system if its availability are awful.However,high-throughput and large capacity are still the main target in parallel I/O system＇s design by far,and few research on its availability evaluation has been published.In this paper,a method managing to evaluate a parallel I/O system＇s availability based on SANs （Stochastic Activity Networks） model with Mobius modeling environment is expatiated,and the simulation results reveal how the availability of the parallel I/O system is impacted on by the number of global file system,the number of minimum number of OST in a single file system,and the repair period of the whole system.

关 键 词：随机行为网 MOBIUS 并行I/O系统 可用性评估 

分 类 号：TP302[自动化与计算机技术—计算机系统结构]