CoolEdge: hotspot-relievable warm water cooling for energy-efficient edge datacenters

Abstract

As the computing frontier drifts to the edge, edge datacenters play a crucial role in supporting various real-time applications. Different from cloud datacenters, the requirements of proximity to end-users, high density, and heterogeneity, present new challenges to cool the edge datacenters efficiently. Although warm water cooling has become a promising cooling technique for this infrastructure, the one-size-fits-all cooling control would lower the cooling efficiency considerably because of the severe thermal imbalance across servers, hardware, and even inside one hardware component in an edge datacenter. In this work, we propose CoolEdge, a hotspot-relievable warm water cooling system for improving the cooling efficiency and saving costs of edge datacenters. Specifically, through the elaborate design of water circulations, CoolEdge can dynamically adjust the water temperature and flow rate for each heterogeneous hardware component to eliminate the hardwarelevel hotspots. By redesigning cold plates, CoolEdge can quickly disperse the chip-level hotspots without manual intervention. We further quantify the power saving achieved by the warm water

A two-segment LSTM based data center temperature prediction model

“…Moreover, energy efficiency is also an important metric of data centers due to its huge electronic power consumption. The exceeding cooling of the data center to avoid overheating is one of the main reasons for high power usage effectiveness (PUE) [13,32]. The air inlet temperature is an acknowledged thermal metric of the server.…”