nanog mailing list archives

RE: 95th Percentile again!


From: "David Schwartz" <davids () webmaster com>
Date: Sat, 2 Jun 2001 22:23:50 -0700



Any customers who are being billed by an ISP using MRTG should quickly
install their own more accurate and properly designed accounting system
and monitor their end of the pipe to make sure that any errors in MRTGs
measurements remain in their favour.

        Pretty much every billing scheme is based upon statistical sampling in some
form. It's not exactly fair to ignore sampling errors in your favor and then
cry foul should the odds go against you. On the other hand, providers that
use statistical sampling should disclose that to their customers so that
they understand that they're being billed using systems that aren't
necessarily 100% reproducible.

        DS


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