On Fri, Jul 21, 2000 at 07:10:08PM +0200, Frank Tegtmeyer wrote:
> Does anyone have a pointer to a comparison of qmail/sendmail/postfix/...
> that is done at a real world server over a longer period of time?
In the real world, you will not find two sites with identical input load
so that you can compare their output load. That is what benchmarks are
for.
> It should include bandwith use (including DNS) and performance data.
What kind of numbers do you want to see here? Packet-level bandwidth
numbers, or the kind of numbers qmailanalog can produce? I run qmail on
our corporate firewall as a transparent proxy for ALL SMTP mail going in
or out of our network. That firewall also hosts our DNS cache. Right
now we only have about 40-50 client sites behind the firewall, but it
generates 10MB of qmail logs in under 10 days, and the same amount of
dnscache logs in under 2 days for client lookups and 4 days for local
(ie qmail) lookups. This (at this moment) represents 11204 messages to
13470 recipients, totalling 428,035,016 message bytes and 517,887,116
delivered bytes. You want stats? I've got 'em, at least for qmail.
This site will never run sendmail.
By year's end, we are looking to massively scale up the number of client
sites, possibly by an order of magnitude. I think I might have to make
my multilog limits a bit larger...
> The only thing I remember were some graphs about mailer timings (DNS
> lookup, start of delivery and so on). That doesn't give the real world
> picture everyone is talking about.
I believe the graphs you are referring to are the ones at
http://www.kyoto.wide.ad.jp/mta/eval1/eindex.html
This person has gone to a fair amount of work to characterize how
various MTAs deliver messages to mailing lists. However, this is not
exactly what you are asking, and the graphs presented there are
confusing sometimes due to differences in the scales between graphs.
--
Bruce Guenter <[EMAIL PROTECTED]> http://em.ca/~bruceg/
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