Bolch, Gunter ;
Almasi, Bela ;
Sztrik, Janos
:
Modeling Non-Homogenous Terminal Systems Using MOSEL.
Erlangen:
FAU.
1999
TR-I4-99-07.- Interner Bericht.
29 Seiten.
Stichwörter:
Modeling, Performance, Markov Chain, Terminal System, Modeling Language
Abstract:
In this paper we consider a stochastic queueing model for the
performance evaluation of a real life computer system consisting of
n terminals connected with a CPU. A user at terminal i has thinking
and processing times depending on index i. First we discuss
reliable models, and then unreliable models (i.e. the CPU and the
terminals are subject to random breakdowns).
The models described here
are not new, they were studied earlier by different authors. This paper
gives a detailed implementation of the models using MOSEL (MOdeling
Specification and Evaluation Language), developed
at the University of Erlangen, and it is shown that MOSEL is well suited
for modeling such systems.
We give some numerical examples, where the most
important performance measures (such as utilization, response times,
mean queue length) are calculated, to see what is the difference between
the results of MOSEL and the ones published earlier.
In the appendices we publish the source codes of the MOSEL programs mentioned
in this paper.
