Varun Sakalkar
Datacenter Systems Research; System Availability and Reliability Modeling;
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Data Center Power Oversubscription with a Medium Voltage Power Plane and Priority-Aware Capping
David Landhuis
Shaohong Li
Darren De Ronde
Thomas Blooming
Anand Ramesh
James Kennedy
Christopher Malone
Jimmy Clidaras
Proceedings of the Twenty-Fifth International Conference on Architectural Support for Programming Languages and Operating Systems, Association for Computing Machinery, New York, NY, USA (2020), 497–511
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As major web and cloud service providers continue to accelerate the demand for new data center capacity worldwide, the importance of power oversubscription as a lever to reduce provisioning costs has never been greater. Building on insights from Google-scale deployments, we design and deploy a new architecture across hardware and software to improve power oversubscription significantly. Our design includes (1) a new medium voltage power plane to enable larger power sharing domains (across tens of MW of equipment) and (2) a scalable, fast, and robust power capping service coordinating multiple priorities of workload on every node. Over several years of production deployment, our co-design has enabled power oversubscription of 25% or higher, saving hundreds of millions of dollars of data center costs, while preserving the desired availability and performance of all workloads.
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