An Improved Architecture For Future Large-scale Data Centers

With the widely development of information technology, data center networks are developing toward more large-scale networks. As one of the key factor to performance on data center, some novel network architectures have been proposed and got more attention.This paper describes some typical data center network architecture research and presents Diamond, an improved Fat-tree architecture for large-scale data centers. Diamond replaces all the aggregation switches of Fat-tree with edge switches and connects directly edge switches to core switches. By this alteration, the average route path and End-to-End delay in Diamond are10%less than that in Fat-tree. Moreover, Diamond has a higher aggregate bandwidth than Fat-tree. We design FAR, a simple and high efficient routing method for Diamond. In FAR, each switch requires only hundreds of route entries to support a large-scale network with tens of thousands servers, and to build FAR routing tables, switches exchange very few messages. Diamond and its FAR routing are verified through Click router based on XORP and OPNET simulations. With Click router on the open routing platform, a practical condition could be provided for the experiment on the new algorithm FAR. The simulation result by OPNET presents a detailed comparison between Fat-tree and Diamond through experimental data and analysis.It is an important stage of development that all kinds of industry have paid their extremely wide attention to data center. This paper presents a novel network architecture named as diamond and a new routing algorithm, which provide a new thought for data center research.21figures,16tables and39references are contained in this paper.