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Performance modeling and analysis of hypoexponential network servers

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Abstract

Hypoexponential servers are commonly seen in today’s computer and communication networks whereby incoming packets are processed by the network server in multiple stages with each stage having a different processing time. This paper presents an analytical model to capture the behavior and subsequently analyze the performance of these network servers or similarly behaving systems. From our model, we derive key performance measures and features which include CPU utilization, system idleness, mean throughput, packet loss, mean system and queuing packet delays, and mean system and queue sizes. In addition, we present two popular finite queueing models (namely, M / D / 1 / K and M / M / 1 / K) to approximate our hypoexponential model. Results show that the both of these approximate models give close results when the system queue size is large.

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Acknowledgements

The authors thank the anonymous reviewers for their valuable comments, which helped us to considerably improve the content, quality, and presentation of this paper.

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Correspondence to Khaled Salah.

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Salah, K., El Kafhali, S. Performance modeling and analysis of hypoexponential network servers. Telecommun Syst 65, 717–728 (2017). https://doi.org/10.1007/s11235-016-0262-3

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Keywords

  • Network servers
  • Finite queueing systems
  • Hypoexponential service
  • Performance modeling and analysis