A Workload Assignment Policy for Reducing Power Consumption in Software-Defined Data Center Infrastructure

Takaaki DEGUCHI  Yoshiaki TANIGUCHI  Go HASEGAWA  Yutaka NAKAMURA  Norimichi UKITA  Kazuhiro MATSUDA  Morito MATSUOKA  

IEICE TRANSACTIONS on Communications   Vol.E99-B   No.2   pp.347-355
Publication Date: 2016/02/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2015EBP3267
Type of Manuscript: PAPER
Category: Energy in Electronics Communications
data center,  power consumption reduction,  workload assignment,  air conditioner,  computational fluid dynamics,  

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In this paper, we propose a workload assignment policy for reducing power consumption by air conditioners in data centers. In the proposed policy, to reduce the air conditioner power consumption by raising the temperature set points of the air conditioners, the temperatures of all server back-planes are equalized by moving workload from the servers with the highest temperatures to the servers with the lowest temperatures. To evaluate the proposed policy, we use a computational fluid dynamics simulator for obtaining airflow and air temperature in data centers, and an air conditioner model based on experimental results from actual data center. Through evaluation, we show that the air conditioners' power consumption is reduced by 10.4% in a conventional data center. In addition, in a tandem data center proposed in our research group, the air conditioners' power consumption is reduced by 53%, and the total power consumption of the whole data center is exhibited to be reduced by 23% by reusing the exhaust heat from the servers.