IA-TCP: A Rate Based Incast-Avoidance Algorithm for TCP in Data Center Networks

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Executive Summary

In recent years, the data center networks commonly accommodate applications such as MapReduce and web search that inherently shows the in cast communication pattern; multiple workers simultaneously transmit TCP data to a single aggregator. In this environment, the TCP performance is significantly degraded in terms of goodput and query completion time, as a result of the severe packet loss at Top of Rack (ToR) switches. The TCP senders aggressively transmit packets causing throughput collapse even though the network pipe size, i.e., bandwidth delay product, is extremely small.

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