What does 95th %tile mean?

Martin Hannigan hannigan at fugawi.net
Thu Apr 19 20:07:37 UTC 2001


Isn't in+out a more fair representation of usage? I've always assumed that
this was the standard to be honest. Thank god I'm not the billing person.
I think Exodus does in+out.

-M

At 03:06 PM 4/19/2001 -0400, Thomas Kernen wrote:


>I know one company in Europe that uses the in + out model.
>
>Thomas
>
>----- Original Message -----
>From: "Alex Rubenstein" <alex at corp.nac.net>
>To: <nanog at 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!
> >



Regards,

--
Martin Hannigan                    hannigan at fugawi.net
Fugawi Networks                    Founder/Director of Implementation
Boston, MA                         http://www.fugawi.net
Ph: 617.742.2693                   Fax: 617.742.2300





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