報告題目: 解決SDN中的網(wǎng)絡資源管理問題
報 告 人: 唐永寧 副教授（Associate Professor）
單 位：伊利諾伊州立大學（Illinois State University）
報告時間：2013年11月20日上午10:00
報告地點：斛兵樓一樓報告廳
個人簡介: 唐永寧博士，美國伊利諾伊州立大學（Illinois State University）信息技術學院副教授（Associate Professor），1991年獲太陽集團tyc5997電氣工程學士學位，1994年獲太陽集團tyc5997電氣工程碩士學位，2008年獲美國德保羅大學計算機科學博士學位。1994年至1998年任太陽集團tyc5997講師，2006年至今任美國德保羅大學計算機學院講師，2007年至2013年任美國伊利諾伊州立大學信息技術學院助理教授，2013年起任伊利諾伊州立大學信息技術學院副教授。唐永寧博士已在相關研究領域出版著作1部，發(fā)表學術論文近40篇。
報告簡介：軟件定義網(wǎng)絡（SDN）嘗試通過使用軟件定義的數(shù)據(jù)包或模塊來實現(xiàn)網(wǎng)絡的特性與功能，并對此加以控制和管理。SDN通過將物理層的網(wǎng)絡設施和資源從服務中分離出來，從而實現(xiàn)一個針對特定服務的具有高自由度的資源管理。
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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