[36755] in North American Network Operators' Group
Re: What does 95th %tile mean?
daemon@ATHENA.MIT.EDU (Thomas Kernen)
Thu Apr 19 15:09:14 2001
Message-ID: <016301c0c903$de57e140$0b00a8c0@WOLFORD>
From: "Thomas Kernen" <tkernen@deckpoint.ch>
To: "Alex Rubenstein" <alex@corp.nac.net>, <nanog@merit.edu>
Date: Thu, 19 Apr 2001 15:06:39 -0400
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I know one company in Europe that uses the in + out model.
Thomas
----- Original Message -----
From: "Alex Rubenstein" <alex@corp.nac.net>
To: <nanog@merit.edu>
Sent: Thursday, April 19, 2001 10:09 AM
Subject: What does 95th %tile mean?
>
> I've gotten myself into an argument with a provider about the definition of
> 'industry-standard 95th percentile method.'
>
> To me, this means the following:
>
> a) take the number of bytes xfered over a 5 minute period, and determine
> rate for both the inbound and outbound. Store this in your favorite
> data-store.
>
> b) at billing time, presumably on the first of the month or some other
> monthly increment, take all the samples, sort them from greatest to least,
> hacking off the top 5% of samples. Actually, this is done twice, once for
> inbound, once for outbound. Then, take the higher of those two, and multiply
> it by your favorite $ multiple (ie, $500 per megabit per second, or $1 per
> kilobit per second, etc).
>
> I think that most people agree with the above; the issue we are running into
> is one rogue provider who is billing this at in + out, not the greater of in
> or out.
>
> How is everyone else doing it? Specifically, larger folks (UU, Sprint, CW,
> Exodus/FGC, GX, Qwest, L3)
>
> Thanks!
>
