Jason Gunthorpe wrote:
>
> 30K messages/hour is only 8 messages/sec. Our lists (using qmail) average
> that when they are going, and peak out at 13msg/sec. This is all on a P133
> w/64M ram and IDE disks. Primarily we are disk bound (on the fsyncs of the
> user list)
Damn....what OS, and does it do anythign else besidesact as MTA?
> I *expect* postfix and zmail can both get similar numbers, give or take a
> percent without too much trouble. Exim/sendmail I think it would be hard
> to push it up to those concurrency levels.
Why not with exim?
> The only reason we get those rates is due to the 240 concurrent outbound
> delivery processes - that is the critical factor when you are doing lists,
> you want to maximimze concurrancy so that slow remote hosts do not hold up
> the works, we typically have over 50 'slow' connections that hang around
> and gum things up.
Exim can be set to spawn up to X amount of processes per queue and up to a max
of X concurrent queues during delivery. Does this not put it on par?
Received: from cr355197-a.poco1.bc.wave.home.com ([24.112.113.88] helo=whiskey.fireplug.net)
by exim-colo-01.whoc.theplanet.co.uk with esmtp (Exim 3.13 #1)
id 12eZAl-00057H-00
for exim-users@???; Mon, 10 Apr 2000 09:03:51 +0100
Received: from sdjl by whiskey.fireplug.net with local (Exim 3.13 #2)
id 12eZ8V-0002Vm-00
for exim-users@???; Mon, 10 Apr 2000 01:01:31 -0700
Received: from sl by whiskey.fireplug.net with local (Exim 3.13 #2)
id 12eZ7s-0002Ul-00
for sdjl@???; Mon, 10 Apr 2000 01:00:52 -0700
Received: from sl by whiskey.fireplug.net with local (Exim 3.13 #2)
id 12eYlg-0002Rh-00
for sl@???; Mon, 10 Apr 2000 00:37:56 -0700
To: sl@???
Path: whiskey.fireplug.net!not-for-mail
From: sl@??? (Stuart Lynne)
Newsgroups: list.exim-users
Subject: Re: [Exim] Very large mailing lists (Exim vs Isocor)
Date: 10 Apr 2000 00:37:56 -0700
Organization: fireplug
Distribution: local
Message-ID: <8cs0ck$95r$1@???>
References: <20000409235949.A507@???>
Reply-To: sl@???
Resent-From: sl@???
Resent-Date: Mon, 10 Apr 2000 01:00:52 -0700
Resent-To: sdjl@???
Resent-Message-Id: <E12eZ7s-0002Ul-00@???>
Resent-From: sdjl@???
Resent-Date: Mon, 10 Apr 2000 01:01:31 -0700
Resent-To: exim-users@???
Resent-Sender: "Stuart Lynne, FireplugPoste" <sdjl@???>
Sender: exim-users-admin@???
Errors-To: exim-users-admin@???
X-BeenThere: exim-users@???
X-Mailman-Version: 2.0beta2
Precedence: bulk
List-Id: A user list for the exim MTA <exim-users.exim.org>
In article <20000409235949.A507@???>,
Ian Southam <exim@???> wrote:
>On Sun, Apr 09, 2000 at 06:32:49PM -0400 Mitch Vincent wrote :
>
>> Not being developed anymore? Wow, I hadn't heard that (though I probably
>> wouldn't have since I don't use it :- ) )
>>
>> Still, many, many people use Qmail when they need a fast MTA, it seems to be
>> a workable solution even with it's bugs.
>
>Hello,
>
>True but, despite the fact that Exim is not designed for speed or scalability
>really it does both quite well. I know a good few large ISPs using it and of
>(Freeserve being one). It may well do the task (without the bugs).
I've never quite got around to trying qmail (actually I think now I would
try postfix if I was going to try something else) cause exim always just
kind of does everything we need it to do. I've been using it since its
first public release.
We recently put a small exim server together for a commercial mailing list
that sends out batches of messages two to three times a day. Up to 50,000
messages at a time and they wanted them delivered in less than an hour. To
do this they bought four(!!) low end sun boxes (before they talked to us,
while they where trying to get things working with sendmail).
Exim managed to deliver over 90% in about 15 minutes on one server. We did
use a few tricks. For example limiting the number of recipients to about 500
per message etc. And sorting so that all messages to the same domain where
delivered once (big win for hotmail and aol etc).
Basically exim on a mid range server (say dual pentium 700) with appropriate
raid array should be able to handle a million messages a day without breaking
into a sweat if a little care is taken in setting it up.
--
Stuart Lynne <sl@???> __O
<http://www.thinlinux.org> _-\<,_ 604-461-7532
PGP Fingerprint: 28 E2 A0 15 99 62 9A 00 (_)/ (_) 88 EC A3 EE 2D 1C 15 68
