# Re: Estimating number of users with number of IPs (fwd)

From: Hyunchul Kim <hckim@dont-contact.us>
Date: Mon, 22 Dec 1997 16:26:17 +0900 (KST)

> > > Greetings!!
> > > i'd like to ask a question about the relationship between
> > > the number of users and IPs.
> > > maybe it could be calculated as .... (IPs * X), i think.
> > > does anybody know the reasonable value of X or other formula, if any?
> >
> > "X" depends on your user population, I guess.
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> of course it is.
> i mean, "rough(not exact) approximation or order of X"
> which might have been used in many internet domain/population surveys
> for calculating/estimating internet user population with the number of hosts
>
> Maybe....5 - 10? or more?
>
> sincerely,
> hyunchul kim
>
> - hckim@cosmos.kaist.ac.kr

the value of X is roughly about 4-5,
according to my some days' investigation.

the number of hosts on the Internet was about 19 million and
<http://www.nw.com>, July 1997.
the number of users on the Internet was about(over) 90 million.
<http://www.nua.ie>, Dec 1997.

thanks for replies....

Sincerely,
Hyunchul Kim

- hckim@cosmos.kaist.ac.kr

>
> For example, if your Squid
> > serves PC clusters at some university, X will be very large (30-40?). If the
> > cache is for research workstations in the CS department, X will be close to 1.
> > If you have a mixture, you can calculate X if you know the proportion of the
> > components.
> >
> > For a cluster-like scenario, I believe you can validate your calculations by
> > using a fairly simple script that counts the number of "startup pages"
> > requested from Squid during the day. It is probably feasible to guess what
> > the startup page is for every regular client by analizing access logs for a
> > week or so. It will be a page that "often" starts a sequence of requests from
> > a particular client after a "long" idle period. Counting just the number of
> > idle periods might work as well provided your clients do not "sleep" at the
> > terminal with the browser running.
> >
> > Also, in many cluster-like environments, you know a priory what the startup