摘要基础设施即服务(Infrastruction as a Service,IaaS)云对传统数据中心的实体资源进行整合,对外提供具备按需使用、弹性等性质的资源服务。IaaS云为了应对到达时间不可预知的负载峰值段,需要快速响应资源扩展请求,而现有的横向扩展方法不能在短时间内满足资源扩展需求。本文主要研究OpenStack架构的IaaS云中计算资源服务的快速横向扩展问题,并基于SnowFlock虚拟机克隆技术[1]提出了资源服务的两阶段快速扩展框架,应对到达时间不可预知的资源需求。
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