基于风险的云计算环境用户效用分析  

Analysis of User Utility in Cloud Computing Environment Based on Risk

作　　者：杨柳[1] 唐卓[1] 朱敏[1] 李仁发[1] 

机构地区：[1]湖南大学嵌入式系统与网络实验室,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2011年第7期78-82,共5页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(60673061);中国博士后科学基金资助项目(20100480936)

摘　　要：通过分析云计算环境中资源分配和用户任务请求的过程,提出了云计算环境中的用户效用函数,并引入风险对云计算服务和资源由于被非授权访问造成的损失进行量化,得出了基于风险的用户期望效用函数.最后,通过仿真实验论证了任务执行数与用户需求,时间,费用和用户效用之间的关系.从仿真实验可以看出,用户的一次提交的任务数存在一个理想值,在这个理想值附近,其用户效用最好.Through the process of resource distribution and user request, this paper proposed a user utility function for tasks in the cloud computing environment. In this model, the risk is invoked to quantize the loss of the services and resources in the unauthorization access. Based on risk, this paper proposed a user expected utility function. Finally, the simulation experiment demonstrates the relation among the tasks quantity and the users＇ request, time, and cost. Through the experiment, a perfect value exists for the task quantity, and near this perfect value, the users＇ utility can be optimized.

关 键 词：云计算 用户期望 效用 风险 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]