云计算通过虚拟化技术为用户提供基础架构即服务(IaaS),IaaS平台上应用和服务的负载是动态变化的,这就导致其对虚拟资源的需求也是动态变化的.因此收集和分析云平台内部虚拟资源的占用量,根据需求对其进行弹性调度就成为提高整个云计算平台服务性能和资源利用率的关键.从负载均衡和降低云平台使用者成本的角度出发,根据云平台内部虚拟机的负载提出了一种弹性云架构.仿真实验结果表明,该方法能够提高虚拟资源的使用率以及降低用户的使用成本.%Cloud Computing provides infrastructure as a service (IaaS) for users based on virtualization technology. The load of applications and services on IaaS platform is dynamic, thus its demand of virtual resource is also dynamic. Therefore, to collect and analyze the virtual resources footprint of in the platform, and flexibly scheduling them on demand has become the key point to improve overall service performance and resource utilization ratio of the cloud computing platform. This paper, with the concern of load balancing and reducing the user cost of the cloud platform, brings forward an elastic cloud structure based on the load of virtual machine in the platform. Simulation results show that the method can improve the utilization ratio of virtual resources and reduce user cost.
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