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http://dx.doi.org/10.7236/JIWIT.2012.12.6.215

Effects of Packet-Scatter on TCP Performance in Fat-Tree  

Lim, Chansook (Dept. of Computer & Info. Communications Engineering, Hongik University)
Publication Information
The Journal of the Institute of Internet, Broadcasting and Communication / v.12, no.6, 2012 , pp. 215-221 More about this Journal
Abstract
To address the bottleneck problem in data center networks, there have been several proposals for network architectures providing high path-diversity. In devising new schemes to utilize multiple paths, one must consider the effects on TCP performance because packet reordering can make TCP perform poorly. Therefore most schemes prevent packet reordering by sending packets through one of multiple available paths. In this study we show that packet reordering does not occur severely enough to have a significant impact on TCP performance when scattering packets through all available paths between a pair of hosts in Fat-Tree. Simulation results imply that it is possible to find a low-cost solution to the TCP performance problem for Fat-Tree-like topologies.
Keywords
Data Center Network; Fat-Tree; load balancing; TCP; packet reordering;
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