报告题目: 解决SDN中的网络资源管理问题

报 告 人: 唐永宁 副教授（Associate Professor）

单 位：伊利诺伊州立大学（Illinois State University）

报告时间：2013年11月20日上午10:00

报告地点：斛兵楼一楼报告厅

个人简介: 唐永宁博士，美国伊利诺伊州立大学（Illinois State University）信息技术学院副教授（Associate Professor），1991年获bat365在线平台官网电气工程学士学位，1994年获bat365在线平台官网电气工程硕士学位，2008年获美国德保罗大学计算机科学博士学位。1994年至1998年任bat365在线平台官网讲师，2006年至今任美国德保罗大学计算机学院讲师，2007年至2013年任美国伊利诺伊州立大学信息技术学院助理教授，2013年起任伊利诺伊州立大学信息技术学院副教授。唐永宁博士已在相关研究领域出版著作1部，发表学术论文近40篇。

报告简介：软件定义网络（SDN）尝试通过使用软件定义的数据包或模块来实现网络的特性与功能，并对此加以控制和管理。SDN通过将物理层的网络设施和资源从服务中分离出来，从而实现一个针对特定服务的具有高自由度的资源管理。

Tackling Network Resource Management in SDN

Software Defined Networking attempts to use software defined packages or modules for implementing network features/functions and their control and management. SDN decouples physical networking infrastructure/resources from the services that utilize them so that a controlled level of flexibility in resources assignment can be achieved seamlessly for the desired services. Network management is challenging. Modern data center networks commonly adopt multi-rooted tree topologies. Equal-Cost Multi-Path (ECMP) is often used to achieve high link utilization and improve network throughput. Meanwhile, max-min fairness is widely used to allocate network bandwidth fairly among multiple applications. However, today’s data centers usually host diverse applications, which have various priorities (e.g., mission critical applications) and service level agreements (low latency and high throughput).It is unclear how to adopt ECMP forwarding and max-min fairness in the presence of such requirements. We propose Prioritized Max-Min Fair Multiple Path forwarding (PMP) to tackle this challenge. PMP can optimally allocate current available bandwidth to maximally satisfy user demands. When predefined application requirements are available, PMP can prioritize current demands and allocate available bandwidth accordingly. Our performance evaluation results show that PMP can improve application throughput 10-20% on average and increase overall link utilization especially when the total demanded bandwidth close or even exceed the bisectional bandwidth of a data center network.

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