一种收益敏感的虚拟资源按需提供方法  

Benefit-Aware On-Demand Provisioning Approach for Virtual Resources

作　　者：吴恒[1,2,3] 张文博[1] 张建华[1,2,3] 魏峻[1,2] 黄涛[1,2] 

机构地区：[1]中国科学院软件研究所软件工程技术研发中心,北京100190 [2]计算机科学重点实验室(中国科学院软件研究所),北京100190 [3]中国科学院大学,北京100049

出　　处：《软件学报》2013年第8期1963-1980,共18页Journal of Software

基　　金：国家自然科学基金(61173004);国家重点基础研究发展计划(973)(2009CB320704);国家高技术研究发展计划(863)(2012AA011204);国家科技支撑计划(2011BAH11B04)

摘　　要：基于虚拟机的资源重配置操作具有耗时长并伴随性能衰减的特点.已有的Cost-Oblivious和Cost-Aware方法在面对Internet突变负载时存在因经常执行资源重配置操作而导致频繁QoS违约的不足.提出了一种收益敏感(benefit-aware)的资源按需提供方法.该方法首先考虑了Web应用在配置稳定期内的QoS获益,并以此构建收益函数;然后,以收益率最大化原则作为资源重配置策略选择的依据.实验结果表明,该方法与Cost-Oblivious方法相比最多能节约25%的资源成本,而与Cost-Aware方法相比则能有效减少Web应用在突变负载下的QoS违约次数.It is a challenging problem to provide QoS（quality of service） in the virtualization-based cloud computing environment.Existing efforts have addressed this challenge based on either Cost-Oblivious approaches,or Cost-Aware approaches.However,both approaches may suffer frequent QoS violations under typical flash crowd workload.For instance,both approaches ignore the benefit gained after configuration changes.In this paper,a benefit-aware approach according to the profit rate maximization principle is introduced to address this problem.Here,the benefit means the satisfaction percept of the duration that application continuously guarantees the QoS in the new configuration.Experimental results based on TPC-W benchmark show that this benefit-aware approach can save the costs of VM resources as much as 25% and can effectively reduce the QoS violations compared through a cost-aware approach.

关 键 词：云计算 虚拟化 资源重配置 收益敏感 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]