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As long as the parallel computation is not carried out on a single
machine with multiple processors, a simulation has to spread out to
remote machines using a network connection as depicted in
Figure 6.3. It will therefore use machines with different
properties in terms of speed, memory, and system load. This implies
that the computation time which is necessary to finish a given
simulation problem will differ from one machine to another. A further
implication of distributed computation is an increased susceptibility
to single point failures, which will degrade the robustness of the
whole simulation system unless measures are taken to account for them.

*Rudi Strasser *

1999-05-27