虚拟化软件定义网络中高效的大链路分配方案

Wontae Jeong, Gyeongsik Yang, Seong-Mun Kim, C. Yoo
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引用次数: 2

摘要

针对虚拟软件定义网络中的大链路,提出了一种高效的资源分配方案。基于软件定义网络的网络虚拟化提供了大链路概念,方便了简单的网络管理——大链路将一组交换机和链路映射成单个虚拟链路。然而,本文报告了一个大链路的问题,即在虚拟化的SDN环境中存在严重的性能下降。我们找到了原因:现有的网络管理程序在为大链路分配物理资源时没有考虑网络流量。为了解决这个问题,我们提出了大链路分配方案(BAS),该方案在分配和重新分配资源到大链路时考虑了网络流量。利用OpenVirteX进行了原型实现,实验表明,带BAS的大链路的吞吐量是不带BAS的大链路的4倍。此外,通过在OpenVirteX中包含计时器,BAS减少了不必要的资源重新分配,从而降低了开销。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Efficient big link allocation scheme in virtualized software-defined networking
We propose an efficient resource allocation scheme for big links in virtualized software-defined networking. Network virtualization based on software-defined networking provides big link concept to facilitate simple network management — big link maps a set of switches and links into a single virtual link. However, this paper reports an issue of the big link in that there is a severe performance degradation in virtualized SDN environments. We find the cause: the existing network hypervisors do not consider the network traffic when allocating physical resources to a big link. To address this issue, we present big link allocation scheme (BAS) that considers network traffic when allocating and reallocating resources to a big link. A prototype implementation is done with OpenVirteX, and experiments demonstrate that the big link with BAS achieves four times greater throughput than that of the big link without BAS. Moreover, by including a timer in OpenVirteX, the BAS decreases unnecessary resource reallocations, which reduces overhead.
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