Energy-efficient Deployment of Fat-Tree Hybrid Data Center Networks

Mingmeng Luo, Hongguang Sun, Min Sheng, Yan Shi, Jiandong Li
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Abstract

Augmenting 60GHz wireless device to the Top-of- Rack (ToR) switch to build hybrid Data Center Network (hybrid DCN) is proven to be effective in alleviating traffic congestion in DCN. However, wireless transmissions at very high frequency suffer from limitations of short transmission range, blockage, and interference. In the Fat-Tree hybrid DCN, ToRs are classified into two types: ToRs within the same pod (intra-pod ToR) and ToRs between different pods (inter-pod ToR). To establish wireless links between inter-pod ToR switches is more efficient than that within the intra-pod, due to the reduction of switches and the cost resulting from multihop transmissions. In this paper, we propose an energy-efficient offline deployment scheme to construct the Fat-Tree hybrid DCN by jointly considering the wired and wireless links. The proposed sheme can maximize the number of wireless links between inter-pod ToRs and make the wireless links distribute evenly among different pods. The numerical results show that the proposed scheme can potentially exploit the wireless links between different pods to enhance the network energy efficiency by reducing the average path length and the use of switches in the hybrid DCNs.
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胖树混合数据中心网络的节能部署
在机架顶交换机(ToR)上增加60GHz无线设备,构建混合型数据中心网络(hybrid DCN),可有效缓解DCN中的流量拥塞。然而,在非常高的频率下,无线传输受到传输距离短、阻塞和干扰的限制。在Fat-Tree杂交DCN中,ToR分为两种类型:同一荚内的ToR(荚内ToR)和不同荚间的ToR(荚间ToR)。由于减少了交换机数量和多跳传输带来的成本,在pod间ToR交换机之间建立无线链路比在pod内更有效。在本文中,我们提出了一种节能的离线部署方案,通过联合考虑有线和无线链路来构建Fat-Tree混合DCN。该方案可以最大限度地提高pod间tor间的无线链路数量,并使无线链路在不同pod间均匀分布。数值计算结果表明,该方案可以通过减少混合DCNs中平均路径长度和交换机的使用,潜在地利用不同pod之间的无线链路来提高网络的能量效率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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