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Issue No. 12 - Dec. (2013 vol. 24)
ISSN: 1045-9219
pp: 2365-2374
Yong Cui , Tsinghua University, Beijing
Hongyi Wang , Tsinghua University, Beijing
Xiuzhen Cheng , The George Washington University, Washington DC
Dan Li , Tsinghua University, Beijing
Antti Yla-Jaaski , Alato University, Helsinki
Unbalanced traffic demands of different data center applications are an important issue in designing data center networks (DCN). In this paper, we present our exploratory investigation on a hybrid DCN solution of utilizing wireless transmissions in DCNs. Our work aims to solve the congestion problem caused by a few hot nodes to improve the global performance. We model the wireless transmissions in DCN by considering both the wireless interference and the adaptive transmission rate. Besides, both throughput and job completion time are considered to measure the impact of wireless transmissions on the global performance. Based on the model, we formulate the problem of channel allocation as an optimization problem. We also design an approximation algorithm with an approximation bound of 1/2 and a genetic algorithm to address the scheduling problem. A series of simulations are performed to evaluate and demonstrate the effectiveness of our wireless DCN scheme.
Wireless communication, Interference, Channel allocation, Database systems, Algorithm design and analysis, Genetic algorithms

Y. Cui, H. Wang, X. Cheng, D. Li and A. Yla-Jaaski, "Dynamic Scheduling for Wireless Data Center Networks," in IEEE Transactions on Parallel & Distributed Systems, vol. 24, no. 12, pp. 2365-2374, 2013.
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