[1]ZHANG Jiangqiang,ZHAO Ning,LIU Wenqi.Optimization of the number of servers in a cloud computation center with two demand classes[J].CAAI Transactions on Intelligent Systems,2017,12(5):601-607.[doi:10.11992/tis.201703042]
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Optimization of the number of servers in a cloud computation center with two demand classes

CAAI Transactions on Intelligent Systems[ISSN 1673-4785/CN 23-1538/TP] Volume: 12 Number of periods: 2017 5 Page number: 601-607 Column: 学术论文—智能系统 Public date: 2017-10-25
Title:
Optimization of the number of servers in a cloud computation center with two demand classes
Author(s):
ZHANG Jiangqiang;  ZHAO Ning;  LIU Wenqi
Faculty of Science, Kunming University of Science and Technology, Kunming 650500, China
Keywords:
cloud computing; queuing system; two demand classes; performance measure; power consumption; cost; optimization of the number of servers
CLC:
TP393.02
DOI:
10.11992/tis.201703042
Abstract:
In order to improve the service quality and to save the system cost of the cloud computing center, for a cloud computing center with two demand classes, a method to optimize the number of servers was proposed. First, a queuing model having two demand classes was established for analyzing performance measures such as distribution of the probability of stability and mean queue length; next, a power consumption model was established on the cloud computing center; finally, the wait and power-consumption cost of the system were used together to construct the cost function of the system and optimize the server quantity for realizing the lowest cost. The numerical results show that the optimal number of servers is a non-decreasing function of the arrival rate of demands. To minimize the system cost, dynamically adjusting the number of servers is necessary.
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