A closed network model for I/O systems

R.J. Wijbrands, J. Wessels

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review


In this paper we look at the problem of modelling and analyzing an I/O subsystem. There are two conventional ways to look at this problem. The first is to model the I/O subsystem as an M|G|1 queue, thus neglecting the CPU influence on the arrival stream. The second way is to use the central server model, treating the nonexponen­tially distributed I/O service times as exponentially distributed.

Here we try to combine the benefits of both methods. We use a closed network model and analyze this by using an adjusted mean-value scheme. In this scheme service times depend on the number of clients in system. We make use of the residual lifetime dis­tribution of the client in disk service. Some experiments show that the model yields accurate results.
Original languageEnglish
Title of host publicationContributions to operations research (Proceedings of the conference, Oberwolfach, Germany, February 26-March 3, 1984)
EditorsK. Neumann, D. Pallaschke
Place of PublicationBerlin
Number of pages9
ISBN (Electronic)978-3-642-46534-5
ISBN (Print)978-3-540-15205-7
Publication statusPublished - 1985

Publication series

NameLecture Notes in Economics and Mathematical Systems
ISSN (Print)0075-8442


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