数据中心虚拟网络映射综述

随着云计算数据中心的快速发展,其高能耗问题日益凸显。利用虚拟化技术,数据中心可以实现物理资源共享,承载多个虚拟网络或虚拟数据中心,对业务负载进行整合与迁移,休眠空闲物理设备,提高物理资源利用率和运营收益,并降低能耗。当前数据中心的虚拟网络映射仍面临算法复杂度高、实时部署难等问题,随着未来分布式数据中心的大量部署建设,多数据中心协作的虚拟网络映射问题也越发重要。文章总结了现有数据中心虚拟网络和虚拟数据中心映射问题的典型研究工作,分析了关键技术与未来潜在的研究和应用方向,认为数据中心虚拟网络映射技术在未来分布式数据中心高能效协同运营模式中具有重要意义。

Overview of Virtual Network Embedding in Data Centers

With the rapid development of cloud data centers(DC),the high energy consumption has become a major problem.The physical resource in a data centers can be effectively shared to embed multiple virtual networks or virtual data centers(VDC)via virtualization.By consolidating and migrating the workloads,some idle physical machines can be shut down to improve the resource utilization and revenue,which will also reduce the energy consumption.Currently,the virtual network embedding(VNE)schemes in the data center are still challenged with problems like high complexity and real-time implementation in online mapping.Besides,multiple DC coordination based VNE is becoming increasing important as the distributed DCs will be deployed on a large scale in the future.Representative works of VNE and VDC embedding are summarized in this survey,and some key techniques and potential research and application directions are also discussed,which revolves the significance of VNE in the energy-efficient collaborative operation of distributed data centers in the future.