while we're on the subject. we currently have about 4000 addresses in the
database, running on a (backup) netfinity 3300 (Dual 450 Xeon, 256 megs, 18
Gigabytes in Raid5)
my primary mail server recently blew up (major hardware problems, not
courier's fault) and i'm in the process of building a new one. to be sure
i'm going for a cluster of servers using CODA as the filesystem backend. has
anyone implemented such a cluster?
i know a lot of peoples uses nfs. the problem with nfs is if the primary
server goes down you're out of luck. coda's support for disconnected
operations and server replication makes it ideal for such a task, especially
with the maildir format. i'm a bit concerned about the performances though.
your experiences? does it work? does it not? why?
--
Daniel Higgins
Administrateur Syst�me / System Administrator
Netcommunications Inc.
Tel: (450) 346-3401 (st-jean)
(514) 871-1844 (montr�al)
Fax: (450) 346-3587
http://www.netc.net
----- Original Message -----
From: "Gordon Messmer" <[EMAIL PROTECTED]>
To: "Courier Mailing List" <[EMAIL PROTECTED]>
Sent: Thursday, March 20, 2003 12:58 PM
Subject: Re: [courier-users] World domination update.
> Eduardo Roldan wrote:
> > On Thu, 2003-03-20 at 02:29, Sam Varshavchik wrote:
> >
> >>Came across the following while browsing:
> >>
>
>>http://www.cs.helsinki.fi/compfac/ohjeet/posti/uudistus2003.en.html#techni
cal
> >
> >
> > You should add a 'Success Stories' page to courier mta site. :)
> >
> > Seriously. Maybe a form to submit existent deployments of courier-mta
> > helps new users get confident.
>
> Indeed. Such a thing would have helped me out the first time I tried to
> migrate to Courier at Real Networks. It would be helpful to have a list
> of users, and maybe throw in some hardware specs, configuration details,
> and performance metrics.
>
> This weekend we're replacing a $50,000 machine that's running sendmail
> with a small cluster running Courier.
>
> The old system is one server running Slackware Linux 8.0, dual 933 Mhz
> proc, 2GB RAM, 700GB of disk that's mostly unusable, and averages a load
> of 40-50 during the afternoon.
>
> On the 13th (just to pick a day) there were 74 errors due to
> insufficient resources (procmail either didn't start or segv'd) and 8944
> errors talking to another local sendmail server (the outbound MX) out of
> 141542 messages total. Only 19611 messages were destined for other mail
> servers. Delivery times ranged from 1 second to almost 3 hours (the
> long delays are the result of the procmail errors). The system supports
> fewer than 1000 users, but is very sluggish and requires a lot of
> maintenance.
>
> The new system cost about $15000. It is built with an NFS backend
> running Red Hat Linux 7.3 on a 1TB RAID 5 set attached to a 3ware 7500
> card, one 1.8 Ghz CPU and 1GB of RAM. There are two Courier servers
> configured identically, load balanced with DNS round-robin. Each has an
> 800Mhz CPU and 500 MB of RAM; they're RLX Technologies 300i blades and
> they also run Red Hat Linux 7.3. Mail is filtered through spamassassin
> (spamd) and amavis/OpenAntiVirus. For backward compatibility, POP3
> service is provided by qmail-popup with an APOP checkpw. All other mail
> services (including POP3S) are provided by Courier. User information
> is stored in an iPlanet directory server. Although these systems have a
> fraction of the hardware resources, and a good deal of additional
> processing, we expect their capacity to be 5 to 10 times that of the old
> sendmail system (our tests indicate so, but real life use may prove
> different).
>
> If we're still discussing it then, I'll provide performance metrics on
> the new system after it goes live.
>
> If anyone has any comments on the new system's setup, my managers are
> interested in feedback from other Courier users.
>
>
>
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