Room 333 Wisenbaker (fishbowl)
Xiaorui Wang, Dept of ECE, Ohio State University
In recent years, power and thermal management has become one of the most important issues for cloud-scale data centers that are rapidly increasing the number of hosted servers. In addition to reducing operating costs, precisely controlling power consumption and heat dissipation is an essential way to avoid system failures caused by power capacity overload or overheating due to increasingly high server density (e.g., blade servers). Power and thermal control becomes even more challenging as many data centers start to adopt virtualization technology for resource sharing, leading to increased utilization and power consumption for each server.
In this talk, we will present a coordinated power, thermal, and performance management framework designed for today’s virtualized data centers. Our framework first provides highly scalable power control solutions in a hierarchical way at three levels: single server, server rack, and entire data center, because there are physical and contractual power limits at each level. Our framework also includes novel performance control algorithms, which provide power-efficient application-level performance guarantees for multiple virtual machines running on the same physical servers. Furthermore, our framework coordinates power and performance control schemes at different system layers to achieve simultaneous guarantees on both power and performance in virtualized data centers. We will also introduce our work on power management for chip multiprocessors, optimal sensor placement for thermal monitoring, and electricity cost control for distributed data centers.
Bio: Xiaorui Wang is an Associate Professor in the Department of Electrical and Computer Engineering at The Ohio State University. He is the recipient of the Office of Naval Research (ONR) Young Investigator (YIP) Award in 2011 and the NSF CAREER Award in 2009. Prior to joining Ohio State, he was an Assistant Professor at the University of Tennessee, Knoxville. In 2005, he worked at the IBM Austin Research Laboratory, designing power control algorithms for high-density computer servers. From 1998 to 2001, he was a senior software engineer and then a project leader at Huawei Technologies Co. Ltd, China, developing distributed management systems for optical networks. He received his doctoral degree from Washington University in St. Louis. His research interests include computer systems, computer architecture, data center power management, embedded and real-time systems, and cyber-physical systems.
Host: Dr. Hu