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Date:      Fri, 7 Jul 2006 16:08:29 +0100
From:      Brian Candler <B.Candler@pobox.com>
To:        Francisco Reyes <lists@stringsutils.com>
Cc:        FreeBSD ISP <freebsd-isp@freebsd.org>, User Freebsd <freebsd@hub.org>
Subject:   Re: IAMP servers in FreeBSD for ISP
Message-ID:  <20060707150829.GA36657@uk.tiscali.com>
In-Reply-To: <cone.1152284622.729752.18477.1000@zoraida.natserv.net>
References:  <cone.1152240742.658037.2598.1000@zoraida.natserv.net> <20060706235712.A1171@ganymede.hub.org> <20060707121846.GA36201@uk.tiscali.com> <cone.1152284622.729752.18477.1000@zoraida.natserv.net>

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On Fri, Jul 07, 2006 at 11:03:42AM -0400, Francisco Reyes wrote:
> >Remember that Courier has a proxy front-end built in, so you can use a 
> >proxy
> >cluster instead of an NFS cluster (or even have some accounts on Courier 
> >and
> >proxy others to Cyrus; a very nice migration tool)
> 
> We tried the proxy once.. but the proxy machine was keeping an instance 
> running during the connection. Basically we saw a connection on the proxy 
> machine and another in the destination machine. Not sure if this is how it 
> is supposed to work or if we missconfigured.

You will see a process running on the proxy machine for the duration of the
connection; all it is doing is copying messages back and forth. There will
be one process per connection, and this is how it's supposed to work.

A process in the process table is not particularly expensive, and its RAM
usage should be very low; however I'd agree that a single-process threaded
proxy would be cheaper.

> >although Courier's sqwebmail has a not particularly pretty interface, it
> >*does* perform very well under heavy usage
> 
> Even with Inbox with large number of files?
> Say 5,000+

Most users had a 10MB quota :-) We also bounced incoming mail for mailboxes
which had not been logged into for 6 weeks.

Regards,

Brian.



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