From owner-freebsd-questions@FreeBSD.ORG Wed Sep 24 07:53:35 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id AF62A1065673 for ; Wed, 24 Sep 2008 07:53:35 +0000 (UTC) (envelope-from wojtek@wojtek.tensor.gdynia.pl) Received: from wojtek.tensor.gdynia.pl (wojtek.tensor.gdynia.pl [IPv6:2001:4070:101:2::1]) by mx1.freebsd.org (Postfix) with ESMTP id A76E48FC26 for ; Wed, 24 Sep 2008 07:53:34 +0000 (UTC) (envelope-from wojtek@wojtek.tensor.gdynia.pl) Received: from wojtek.tensor.gdynia.pl (localhost [IPv6:::1]) by wojtek.tensor.gdynia.pl (8.14.2/8.14.2) with ESMTP id m8O7rQx4062995; Wed, 24 Sep 2008 09:53:27 +0200 (CEST) (envelope-from wojtek@wojtek.tensor.gdynia.pl) Received: from localhost (wojtek@localhost) by wojtek.tensor.gdynia.pl (8.14.2/8.14.2/Submit) with ESMTP id m8O7rQJP062992; Wed, 24 Sep 2008 09:53:26 +0200 (CEST) (envelope-from wojtek@wojtek.tensor.gdynia.pl) Date: Wed, 24 Sep 2008 09:53:26 +0200 (CEST) From: Wojciech Puchar To: Laszlo Nagy In-Reply-To: <48D9E8C0.6020805@shopzeus.com> Message-ID: <20080924095209.L62985@wojtek.tensor.gdynia.pl> References: <48D95A19.8030700@shopzeus.com> <20080923235932.U55719@wojtek.tensor.gdynia.pl> <48D9E8C0.6020805@shopzeus.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: freebsd-questions@freebsd.org Subject: Re: dovecot, maildir, UFS 2 performance X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Sep 2008 07:53:35 -0000 >> i have everything (/) on single partition on most of my servers, including >> those having lots of mail. > I don't think that is clever. sysinstall creates different partitions for / but i do. sysinstall and most people and manuals just copy "traditions". it's nonsense. > Except when my users search for a text in the "message body". Unfortunately, > they often do this. :-( ok right :) >> assuming you configured your RAID1+0 properly it will give you MUCH more >> performance from 10 disks, than RAID1 on 2 - a bit faster - drives. >> >> IMHO you wasted money for SAS drives, simply having SATA only system could >> be enough. > This is true for raw read/write speed. But some I/O operations are seek > intensive. Seek time for a 15 000 rpm SAS disk is lower than it is for a 10 > disk SATA2 RAID. Seek intensive operations should go to SAS. But I'm not sure > what they are. If you say that dovecot is not seek intensive then you > answered my question. :-) with 5000 mails in one folder it will be seek intensive ;)