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Enforcing Transport-Agnostic Congestion Control in SDN-Based Data Centers

机译:在基于SDN的数据中心中执行与传输无关的拥塞控制

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To meet the deadlines of interactive applications, congestion-agnostic transport protocols like UDP are increasingly used side-by-side with congestion-responsive TCP. As bandwidth is not totally virtualized in data centers, service outage may occur (for some applications) when such diverse traffics contend for the small buffers in the switches. In this paper we present SDN-GCC, a simple and practical software-based congestion control mechanism that puts monitoring and control decisions in a centralized controller and traffic control enforcement in the hypervisors on the servers. SDN-GCC builds a congestion control loop between the SDN controller and hypervisors without assuming any cooperation from tenants applications (or transport protocol), ultimately making it deployable in existing data centers without any service disruption or hardware upgrade. SDN-GCC is implemented and evaluated via simulation in ns2 as well as real-life small-scale test-bed deployment and experiments.
机译:为了满足交互式应用程序的最后期限,越来越多的与拥塞无关的传输协议(如UDP)与拥塞响应型TCP并排使用。由于带宽并未在数据中心中完全虚拟化,因此当某些多样化的流量争夺交换机中的小缓冲区时,可能会发生服务中断(对于某些应用程序)。在本文中,我们介绍了SDN-GCC,这是一种基于软件的简单实用的拥塞控制机制,该机制将监视和控制决策置于集中式控制器中,并将流量控制强制置于服务器上的管理程序中。 SDN-GCC可以在SDN控制器和虚拟机管理程序之间建立拥塞控制环,而无需租户应用程序(或传输协议)的任何配合,最终使其可以部署在现有数据中心中,而无需任何服务中断或硬件升级。 SDN-GCC是通过ns2中的仿真以及实际的小型测试平台部署和实验来实现和评估的。

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