Datacenters provide large storage banks and processing power for cloud-based services. The projected power consumption of datacenters in the USA in 2020 is 73 billion KWh/year with 50% of it consumed by the Datacenter Network (DCN). This demonstrates the need to improve power efficiency of datacenters in general and DCNs in particular. To this end, wireless architectures are being investigated, e.g., unlicensed millimeter-wave (mm-wave) bands such as the 60GHz band can deliver multi-gigabit data rates. In this talk we explore a wireless DCN capable of establishing direct communication links between thousands of servers. This eliminates the power-hungry switching fabric used in traditional DCNs, reducing the power consumption of by an order of magnitude. We show that this wireless DCN is still capable of providing comparable performance to that of traditional DCNs. We also discuss the opportunities and advantages of inter-chip wireless communication within servers in the datacenter, and explore future research directions to improve the performance of wireless DCNs.
Amlan Ganguly is an Associate Professor in the department of Computer Engineering at Rochester Institute of Technology, NY. His research interests are in power and energy efficiency of interconnection networks for datacenters, multi-chip systems and embedded platforms. His current primary focus is in millimeter-wave wireless interconnection networks for datacenters and inter-chip communications. He received the NSF CAREER Award in 2015-2016 and his research is funded by NSF and Toyota. He is an associate editor of the Journal of Sustainable Computing and a member of the organizing committee of the Network-on-Chip Symposium (NOCS), Conference on Green and Sustainable Computing (IGSC) and the Workshop on System-Level Interconnect Prediction (SLIP).