Harrison, PGPGHarrisonPatel, NMNMPatelKnottenbelt2015-11-182016-06-072016-06-07ACM Transactions on Modeling and Performance Evaluation of Computing Systems, 2016, 1 (2)2376-3647http://hdl.handle.net/10044/1/27703We introduce the EP queue -- a significant generalization of the MB/G/1 queue that has state-dependent service time probability distributions and incorporates power-up for first arrivals and power-down for idle periods. We derive exact results for the busy-time and response-time distributions. From these, we derive power consumption metrics during nonidle periods and overall response time metrics, which together provide a single measure of the trade-off between energy and performance. We illustrate these trade-offs for some policies and show how numerical results can provide insights into system behavior. The EP queue has application to storage systems, especially hard disks, and other data-center components such as compute servers, networking, and even hyperconverged infrastructure.This work is licensed under a Creative Commons Attribution International 4.0 License.Journal Articlehttps://www.dx.doi.org/10.1145/2818726EP/L00738X/1