Data Centers

Load Balancing Mechanisms in Data Center Networks

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Executive Summary

The authors consider network traffic load balancing mechanisms in data center networks with scale-out topologies such as folded Clos or fat-tree networks. This paper investigates the flow-level Valiant Load Balancing (VLB) technique that uses randomization to deal with highly volatile data center network traffics. Through extensive simulation experiments, the authors show that flow-level VLB can be significantly worse than the ideal packet-level VLB for non-uniform traffics in data center networks.

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