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Subject: Re: UKNM: Re: UKNM Digest V1 #220
From: Duncan Clubb
Date: Fri, 23 Jul 1999 10:37:07 +0100

The host figures in logs refer to the number of distinct IP addresses that
have made requests of the web server. The number of visitors will be at least
the number of hosts, and often considerably more. The reason that they are
not the same is that most ISPs will only appear to the outside world as a
limited number of addresses (they use proxy servers, or DHCP to re-allocate
addresses to users). Thus, for example, 1000 aol users may only appear in the
logs as 100 different addresses. Unless you use log analysis software that
tracks 'sessions' by making general assumptions about the way most people use
web sites, you will not be able to tell how many visitors you have had, only
the number of machines that they get filtered through. As an example, we have
a site that registers 40,000 hosts under the normal method, but 100,000 if
session-based software is used. There is no analysis package (that does not
rely on user registration or use of cookies) that can actually tell you the
number of distinct people that have used your site, by the way, only the
number of distinct visits - someone looking at the site at two different
points of the day will be logged as two visits.

Hope this helps

aaaatatl [dot] uk [dot] com wrote:

> Subject: Question on logs
> From: Anthony Appleby
> If I have 200,000 unique hosts a month, (according to Analog log
> data) how many unique visitors do I have?
> (Thanks to Tristan Palmer at Corpex for the enlightenment :)
> Anthony Appleby
> email aaaatworldsoccernews [dot] com
> ++++++++++++++++++++++++++++++++
> ATL Strategic Communications Ltd
> Welsbach House
> Broomhill Road
> London UK
> SW18 4JQ
> Tel: +44 (0) 181 871 5119
> Fax: +44 (0) 181 874 0084

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  UKNM: Re: UKNM Digest V1 #220, aaa

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