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Performance Implications of Fluctuating Server Capacity

Jingxiang Luo and Carey Williamson

International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS 2007)
San Diego, California (USA), July 16-18, 2007


In this paper, we consider a variant of an M/M/c/c loss system with fluctuating server capacity. Given a set of primary inputs, such as arrival rate, service rate, and capacity fluctuation rate, we develop an analytical model using MRGP, such that blocking and dropping metrics can be calculated explicitly. To gain insight into performance implications of a stochastic capacity queue, we conduct an analysis based on some approximations. We investigate the functional behaviour of the system, using both the approximate model and the exact model. The significance of results in the context of network performance evaluation and capacity planning is highlighted.

{Keywords: network capacity planning, performance, stochastic capacity, MRGP}

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