[36766] in North American Network Operators' Group
Re: What does 95th %tile mean?
daemon@ATHENA.MIT.EDU (Geoff Huston)
Thu Apr 19 20:05:55 2001
Message-Id: <4.3.2.7.2.20010420095528.00c1eaa0@jumble.telstra.net>
Date: Fri, 20 Apr 2001 09:58:54 +1000
To: Sean Donelan <sean@donelan.com>
From: Geoff Huston <gih@telstra.net>
Cc: nanog@merit.edu
In-Reply-To: <20010419234238.2669.cpmta@c004.sfo.cp.net>
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Errors-To: owner-nanog-outgoing@merit.edu
>
> To resolve some billing disputes, the
>top meters include "pulse" connections so you can precisely synchronize
>your check meter with the utility's meter for auditing.
Exactly!
The issue is that 95% systems produce different answers on the same data
set when using the same algorithm simply by altering the relative phase of
the two 95% measurement systems. The only way to get the two systems to
produce the same answer is to get them to synchronize their measurements in
time. I like the idea of the visible 'pulse' to allow the customer to sync
with the provider. Unfortunately I'm not sure I can see what the IP meter
pulse equivalent would be!
