From owner-freebsd-questions Fri Jun 15 0:27: 1 2001 Delivered-To: freebsd-questions@freebsd.org Received: from mail.freebsd-corp-net-guide.com (mail.freebsd-corp-net-guide.com [206.29.169.15]) by hub.freebsd.org (Postfix) with ESMTP id F158D37B407 for ; Fri, 15 Jun 2001 00:26:49 -0700 (PDT) (envelope-from tedm@toybox.placo.com) Received: from tedm.placo.com (nat-rtr.freebsd-corp-net-guide.com [206.29.168.154]) by mail.freebsd-corp-net-guide.com (8.11.1/8.11.1) with SMTP id f5F7Pxl52865; Fri, 15 Jun 2001 00:25:59 -0700 (PDT) (envelope-from tedm@toybox.placo.com) From: "Ted Mittelstaedt" To: "Francisco Reyes" , Cc: "Patrick" , "Daniel Harris" , Subject: RE: postfix && Maildir Date: Fri, 15 Jun 2001 00:25:58 -0700 Message-ID: <000b01c0f56c$6c065000$1401a8c0@tedm.placo.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0 In-Reply-To: Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V4.72.3155.0 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG >-----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