Re: What does 95th %tile mean?

[John Fraizer <nanog () Overkill EnterZone Net>]

When you purchase a DS1, you're purchasing 1.5Mb/s.  That means, 1.5Mb/s
in BOTH directions.  If the circuit was supposed to be billed as 3Mb/s,
they would claim 3Mb/s linerate.

Ethernet, ATM, blah blah blah works the same way.  ADSL and cable modems
are the strange mediums that are not SYMETRIC.

IMHO, 1Mb/s means 1Mb/s IN, OUT or BOTH.


---
John Fraizer
EnterZone, Inc



On Thu, 19 Apr 2001, Martin Hannigan wrote:

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