An analysis of the optimal number of servers in distributed client/server environments

Authors:
Jin Hyun Son;Myoung Ho Kim
Affiliations:
Department of Computer Science and Engineering Hanyang University, 1271 Sa-ldong, Ansan, Kyunggi-do 425-791, South Korea;Division of Computer Science, Korea Advanced Institute of Science and Technology, KAIST, 373-1 Kusung-dong, Yusung-gu, Taejon 305-701, South Korea
Venue:
Decision Support Systems
Year:
2004

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Abstract

In the client/server model for distributed on-line requests processing, the concept of a server class that consists of multiple identical servers is often provided for the fast response time, high fault-tolerance, or continuous availability. As far as we are aware of, there is no concrete formulation that provides the optimal number of servers of a server class in distributed client/ server systems. The number of servers has been usually chosen only by heuristic methods or statistics after monitoring system behavior for some periods of time.In this paper, we propose a method based on queuing theory that determines the optimal number of servers in a server class for a general distributed client/server model that encompasses the state-of-the-art on-line transaction processing environment described in the literature.