虚拟机迁移是数据中心提供的重要功能之一,可以有效地均衡各个基础设施中的工作负载。为有效地减少虚拟机迁移的总时间和对服务性能的影响,该文提出基于代价评估的启发式算法(Heuristic Algorithm based on Cost Evaluation,HACE)。算...虚拟机迁移是数据中心提供的重要功能之一,可以有效地均衡各个基础设施中的工作负载。为有效地减少虚拟机迁移的总时间和对服务性能的影响,该文提出基于代价评估的启发式算法(Heuristic Algorithm based on Cost Evaluation,HACE)。算法在虚拟机迁移的每一步中综合考虑网络中的剩余带宽和迁移时间,通过有机结合并行算法和启发式算法,解决软件定义网络中数据中心大量虚拟机同时迁移时的迁移序列问题。算法在保证安全、依赖关系和性能要求的同时,减少虚拟机的总迁移时间。实验结果表明,与贪心算法相比,该算法能够减少虚拟机总迁移时间达到52.1%,提高迁移性能,确保服务质量。展开更多
The fast technology development of 5G mobile broadband (5G), Internet of Things (IoT), Big Data Analytics (Big Data), Cloud Computing (Cloud) and Software Defined Networks (SDN) has made those technologies one after a...The fast technology development of 5G mobile broadband (5G), Internet of Things (IoT), Big Data Analytics (Big Data), Cloud Computing (Cloud) and Software Defined Networks (SDN) has made those technologies one after another and created strong interdependence among one another. For example, IoT applications that generate small data with large volume and fast velocity will need 5G with characteristics of high data rate and low latency to transmit such data faster and cheaper. On the other hand, those data also need Cloud to process and to store and furthermore, SDN to provide scalable network infrastructure to transport this large volume of data in an optimal way. This article explores the technical relationships among the development of IoT, Big Data, Cloud, and SDN in the coming 5G era and illustrates several ongoing programs and applications at National Chiao Tung University that are based on the converging of those technologies.展开更多
Software-defined networks （SDN） have attracted much attention recently because of their flexibility in terms of network management. Increasingly, SDN is being introduced into wireless networks to form wireless SDN. ...Software-defined networks （SDN） have attracted much attention recently because of their flexibility in terms of network management. Increasingly, SDN is being introduced into wireless networks to form wireless SDN. One enabling technology for wireless SDN is network virtualization, which logically divides one wireless network element, such as a base station, into multiple slices, and each slice serving as a standalone virtual BS. In this way, one physical mobile wireless network can be partitioned into multiple virtual networks in a software-defined manner. Wireless virtual networks comprising virtual base stations also need to provide QoS to mobile end-user services in the same context as their physical hosting networks. One key QoS parameter is delay. This paper presents a delay model for software-defined wireless virtual networks. Network calculus is used in the modelling. In particular, stochastic network calculus, which describes more realistic models than deterministic network calculus, is used. The model enables theoretical investigation of wireless SDN, which is largely dominated by either algorithms or prototype implementations.展开更多
文摘虚拟机迁移是数据中心提供的重要功能之一,可以有效地均衡各个基础设施中的工作负载。为有效地减少虚拟机迁移的总时间和对服务性能的影响,该文提出基于代价评估的启发式算法(Heuristic Algorithm based on Cost Evaluation,HACE)。算法在虚拟机迁移的每一步中综合考虑网络中的剩余带宽和迁移时间,通过有机结合并行算法和启发式算法,解决软件定义网络中数据中心大量虚拟机同时迁移时的迁移序列问题。算法在保证安全、依赖关系和性能要求的同时,减少虚拟机的总迁移时间。实验结果表明,与贪心算法相比,该算法能够减少虚拟机总迁移时间达到52.1%,提高迁移性能,确保服务质量。
文摘The fast technology development of 5G mobile broadband (5G), Internet of Things (IoT), Big Data Analytics (Big Data), Cloud Computing (Cloud) and Software Defined Networks (SDN) has made those technologies one after another and created strong interdependence among one another. For example, IoT applications that generate small data with large volume and fast velocity will need 5G with characteristics of high data rate and low latency to transmit such data faster and cheaper. On the other hand, those data also need Cloud to process and to store and furthermore, SDN to provide scalable network infrastructure to transport this large volume of data in an optimal way. This article explores the technical relationships among the development of IoT, Big Data, Cloud, and SDN in the coming 5G era and illustrates several ongoing programs and applications at National Chiao Tung University that are based on the converging of those technologies.
基金supported in part by the grant from the National Natural Science Foundation of China (60973129)
文摘Software-defined networks （SDN） have attracted much attention recently because of their flexibility in terms of network management. Increasingly, SDN is being introduced into wireless networks to form wireless SDN. One enabling technology for wireless SDN is network virtualization, which logically divides one wireless network element, such as a base station, into multiple slices, and each slice serving as a standalone virtual BS. In this way, one physical mobile wireless network can be partitioned into multiple virtual networks in a software-defined manner. Wireless virtual networks comprising virtual base stations also need to provide QoS to mobile end-user services in the same context as their physical hosting networks. One key QoS parameter is delay. This paper presents a delay model for software-defined wireless virtual networks. Network calculus is used in the modelling. In particular, stochastic network calculus, which describes more realistic models than deterministic network calculus, is used. The model enables theoretical investigation of wireless SDN, which is largely dominated by either algorithms or prototype implementations.
