随着互联网的迅猛发展,包括高清视频等在内的各种互联网应用使得用户接入带宽从过去的几兆发展到百兆甚至千兆。与此同时,互联网数据中心作为承载互联网应用的基础设施,其网络出口带宽也成倍增长。本文对目前互联网数据中心带宽利用情况进行了分析,并对基于交换机虚拟化及SDN技术的数据中心流量调优方案进行了比较和研究。 With the rapid development of the Internet, various Internet applications including high-definition video and the like have enabled users to access bandwidth from the previous few megabytes to 100 megabytes or even 1000 megabytes. At the same time, Internet data centers, as the infrastructure for hosting Internet applications, have exponentially increased their network export bandwidth. This paper analyzes the current bandwidth utilization of Internet data centers and compares and studies data center traffic optimization solutions based on switch virtualization and SDN technologies.