Whittle index approach to energy-aware dispatching

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openAccess
Journal Title
Journal ISSN
Volume Title
Conference article in proceedings
Date
2018
Major/Subject
Mcode
Degree programme
Language
en
Pages
9
19 - 27
Series
International Teletraffic Congress
Abstract
A data center can be modeled as a set of parallel queues, and the dispatcher decides to which queue the arriving jobs are routed. We consider an energy-aware dispatching system in a Markovian setting, where each server upon becoming empty enters a sleep mode to save energy and to activate the server after sleep incurs an additional setup delay cost. We seek to optimize the performance-energy trade-off by applying the socalled Whittle index approach. As our main result, we rigorously prove, under a certain technical assumption, that the problem is indexable, and derive the explicit form of the Whittle index. Our numerical examples demonstrate that the resulting energy-aware Whittle index policy is able to perform very close to the numerically obtained optimal policy.
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Keywords
data center, energy aware, dispatching, task asssignment, Whittle index
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Citation
Aalto , S & Lassila , P 2018 , Whittle index approach to energy-aware dispatching . in International Teletraffic Congress . IEEE , pp. 19 - 27 , International Teletraffic Congress , Vienna , Austria , 04/09/2018 . https://doi.org/10.1109/ITC30.2018.00012