组合云系统可靠性概念漂移在线度量方法研究  

Reliability concept drift online measurement for composite cloud systems

作　　者：王磊[1] 张云秋 徐丙凤 徐逸卿[2] Lei WANG;Yunqiu ZHANG;Bingfeng XU;Yiqing XU(Department of Management Science and Engineering,Nanjing Forestry University,Nanjing 210037,China;Department of Software Engineering,Nanjing Forestry University,Nanjing 210037,China)

机构地区：[1]南京林业大学管理科学与工程系,南京210037 [2]南京林业大学软件工程系,南京210037

出　　处：《中国科学：信息科学》2021年第9期1438-1450,共13页Scientia Sinica(Informationis)

基　　金：江苏省六大人才高峰高层次人才培养项目(批准号:RJFW-029);教育部人文社科基金一般项目(批准号:18YJCZH170)资助。

摘　　要：随着全球云计算产业规模的迅速增长,采用按需付费的方式,基于云服务组合实现大规模软件服务的动态集成和协同,从而构造复杂软件,已成为一种切实可行的方法.所构建的组合云系统运行在动态、不确定的环境下,如何应对系统运行可靠性数据流的概念漂移问题,保障系统运行质量,是一个亟待解决的挑战性问题.为给针对组合云系统的可靠性自适应提供早期指导,本文基于主动式缺陷管理思想,研究组合云系统运行风险的在线感知方法,提出基于Sinkhorn距离的可靠性概念漂移在线度量方法RCDMeas.这一方法通过引入熵正则化和不动点迭代,计算系统历史累积的可靠性流数据和临近的可靠性流数据的分布距离,从而识别组合云系统可靠性概念漂移及系统潜在运行风险.大规模数据实验结果验证了本文方法的有效性.本文的工作对服务组合系统的自动化运维具有重要的理论意义与实际应用价值.Benefiting from the pay-as-you-go business paradigm,the scale of the global cloud computing industry grows rapidly.It has become a possible way to dynamically integrate and cooperate RESTful and SOAP-based component cloud services to develop large-scale complex software systems based on service composition techniques.The constructed composite cloud systems run under dynamic and uncertain operating environments.The issue of how to deal with the concept drift of the reliability data streams to guarantee a stable execution of composite cloud systems has become a grand challenge.To provide some early guidance and act as a trigger mechanism for composite cloud systems’reliability adaptation during the system operation and maintenance,we propose a reliability concept drift measurement approach via Sinkhorn distance for composite cloud systems(or RCDMeas)in this paper.This method employs entropy regularization and fixed-point iteration to identify the reliability concept drift between the historical accumulated reliability flow data and the up-to-date reliability flow data.Large-scale data experiments verified the effectiveness of the proposed approach.

关 键 词：组合云系统 可靠性 概念漂移 在线 运行质量保障 

分 类 号：TP311.5[自动化与计算机技术—计算机软件与理论]