[e2e] Latency Variation and Contention.

Detlef Bosau detlef.bosau at web.de
Wed Aug 17 04:13:32 PDT 2005

Your comments are both, helpful and enlightning.

Nevertheless, please, allow me to re-focus the discussion.

The assertion made by ElRakbawy, Klemm and Lindemann is:

Ass.1:   Network contention can be measured by measuring the RTT 
variance. A small variance is equivalent to a low degree of contention 
and a high variance is equivalent to a high degree of contention.

Assertions like these can be met in literature several times and it´s 
simply the question whether this assertion is true or not.

Personally, I am in great doubt at this.

It´s exactly what David P. Reed pointed out some weeks ago.
Before building brittle constructs upon questionable assertions, it is 
important to have a solid _basis_.

Here in Germany, we have a saying: "Das Fundament ist die Grundlage 
jeglicher Basis." I don´t know whether there exists an english 
equivalent, but this makes the very difference whether a space shuttle 
pilot coming home is busy with landing or busy with prayer.


Detlef Bosau
Galileistrasse 30
70565 Stuttgart
Mail: detlef.bosau at web.de
Web: http://www.detlef-bosau.de
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