关键词: 数据中心网络, TCP Incast问题, 吞吐量崩溃

Abstract: Because the traditional TCP protocol does not apply to the operating mode of data center, the TCP Incast problem occurs when there are common many-to-one traffic patterns in the data center, causing a visible throughput collapse of the application layer. Considering the characteristics of the data center, putting forward a comprehensive solution is the research objective of TCP Incast problem. This paper analyzes the root causes of the problem, enumerates the challenges of the problem, introduces the mathematical model based on the problem, analyzes and summarizes the recent solutions which are classified into link layer, transport layer and application layer, then from the effectiveness, deployment and other different aspects, makes a comprehensive comparison, finding that current solutions based on some specific points almost have drawbacks in different degree. Finally, this paper puts forward some feasible solutions to study the problem, and focuses on combining the technology of SDN and machine learning and designing a new transport protocol.

Key words: data center network, TCP Incast problem, throughput collapse