Date: Fri, 15 Jun 2001 00:25:58 -0700 From: "Ted Mittelstaedt" <tedm@toybox.placo.com> To: "Francisco Reyes" <lists@natserv.com>, <scanner@jurai.net> Cc: "Patrick" <patrick@eahd.or.ug>, "Daniel Harris" <dannyboy@worksforfood.com>, <questions@FreeBSD.ORG> Subject: RE: postfix && Maildir Message-ID: <000b01c0f56c$6c065000$1401a8c0@tedm.placo.com> In-Reply-To: <Pine.BSF.4.32.0106131400550.2932-100000@zoraida.reyes.somos.net>
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>-----Original Message----- >From: owner-freebsd-questions@FreeBSD.ORG >[mailto:owner-freebsd-questions@FreeBSD.ORG]On Behalf Of Francisco Reyes >Sent: Wednesday, June 13, 2001 11:09 AM >To: scanner@jurai.net >Cc: Patrick; Daniel Harris; questions@FreeBSD.ORG >Subject: Re: postfix && Maildir > > >On Wed, 13 Jun 2001 scanner@jurai.net wrote: > > >This is one of those near religious discussions. >They both have issues. >I have an old Solaris machine I am soon migratin to FreeBSD/Communigate >Pro. One of the users had been leaving all his mails since sometime last >year. His Mbox was 50MB+ when I discovered it. Every time he checked his >mail, every 3 minutes, the utilization would jump to 50%+ and become >unresponsive. > >True it is an old Sparc 2, but think what would happen, even on a new >machine, if 10 users had 50MB MBox files and they all had their mail set >to check every 60 seconds. (kind of worst case scenario). > What your not taking into account is how incredibly much slower an old Sparc 2 is than a modern system. It's not just the CPU that's 20 times slower, even more importantly is how badly the Sparc 2 disk I/O is throttled down. We are talking narrow SCSI and very few of the go-fast tricks that exist on modern PC scsi cards, as well as the disks that shipped back then had seek rates an order of magnitude slower. With a modern 1Ghz system and high speed disks the choice of mailbox format won't impact system speed until you have thousands of them. To be fair the Sparc 2 was not envisioned as a server it was supposed to be an X-terminal and single-user UNIX workstaiton. Ted Mittelstaedt tedm@toybox.placo.com Author of: The FreeBSD Corporate Networker's Guide Book website: http://www.freebsd-corp-net-guide.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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