基于Openflow解决TCP incast问题的流控机制研究
首发时间:2014-01-03
摘要:TCP incast,是在多对一的通信模型中,特定的应用场景下,因链路丢包带来的网络性能急剧下降的问题,主要表现为吞吐率远低于链路带宽,导致链路利用率不足。这种应用场景多出现在数据中心中,如分布式存储,MapReduce,和web-search。本课题研究了基于OpenFlow解决TCP incast问题的集中控制机制,并设计出针对流控机制的OpenFlow协议扩展。在SDN网络中,通过集中控制解决TCP incast是一种灵活有效的方案。
关键词: 通信网络技术 OpenFlow 流控机制 TCP incast
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Research to Flow Control Mechanism for TCP incast based on OpenFlow
Abstract:TCP incast, occurred in many to one communication model,leads to the network performance suffer sharp collapse due to the link packet loss. After incast happens, the throughput of the shared link is far below the link bandwidth. TCP incast appears in some specific application scenarios in data center, such as distributed storage,MapReduce and web-search. Our research studied centralized control mechanism for TCP incast based on OpenFlow protocol, and designed the implementation of OpenFlow. We found that the mechanism is a flexible and effective solution to incast in SDN network.
Keywords: Communication network technology OpenFlow Flow control TCP incast
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