摘要
在云服务购买决策研究中,存在忽略用户需求波动以及潜在风险的问题。为此,引入风险成本,构建客户云需求波动环境下的多实例组合购买决策模型,通过案例阐述最优决策取得的条件及原因,并对最优决策与客户未来需求的波动形式、波动幅度、有效工作时间和风险敏感因子的关系分别进行具体分析。分析结果表明,与现有研究相比,该方法能保证用户资源需求的情况下,使总成本最小。
Aiming at the problems in current study on cloud services purchase decision that ignoring fluctuations in users＇ demands, as well as potential risks, this paper makes a study of multi-instance combination decision for minimizing customers＇ cost under cloud demands fluctuation with taking risk cost into consideration, describes the conditions and the reasons for optimal decision with a case in detail, and analyzes the relationship between demand fluctuation, effective working time, risk sensitive factor and optimal decision. Analysis results show that, compared with the existing research, this method can minimum total cost with users＇ resource needs guaranteed.
出处
《计算机工程》
CAS
CSCD
2013年第5期42-47,共6页
Computer Engineering
基金
国家自然科学基金资助项目(71172043
71072077)
国家科技支撑计划基金资助项目(2011BAH16B02)
中央高校基本科研业务费专项基金资助项目(2012-IB-063
2012-zy-110)
关键词
云计算
多实例服务
需求波动
购买成本
风险成本
组合决策
cloud computing
multi-instance service
demands fluctuation
purchase cost
risk cost
combination decision
