From owner-freebsd-arch Fri Nov 3 6:50:35 2000 Delivered-To: freebsd-arch@freebsd.org Received: from mercury.Sun.COM (mercury.Sun.COM [192.9.25.1]) by hub.freebsd.org (Postfix) with ESMTP id 732ED37B4E5 for ; Fri, 3 Nov 2000 06:50:33 -0800 (PST) Received: from ms-emuc07-01.Germany.Sun.COM ([129.157.128.14]) by mercury.Sun.COM (8.9.3+Sun/8.9.3) with ESMTP id GAA16531; Fri, 3 Nov 2000 06:50:28 -0800 (PST) Received: from sun.com (hacker [129.157.133.195]) by ms-emuc07-01.Germany.Sun.COM (8.9.3+Sun/8.9.3/ENSMAIL,v1.9) with ESMTP id PAA24879; Fri, 3 Nov 2000 15:50:26 +0100 (MET) Message-ID: <3A02D061.225A66CA@sun.com> Date: Fri, 03 Nov 2000 15:49:05 +0100 From: Michael Schuster - Sun Germany Organization: Sun Microsystems, Inc. X-Mailer: Mozilla 4.73 [en] (X11; I; SunOS 5.8 sun4u) X-Accept-Language: en MIME-Version: 1.0 To: Cy Schubert - ITSD Open Systems Group Cc: Matt Dillon , Dag-Erling Smorgrav , Marius Bendiksen , Randell Jesup , arch@FreeBSD.ORG Subject: Re: Like to commit my diskprep References: <200011031440.eA3Eebp39614@cwsys.cwsent.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-arch@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Cy Schubert - ITSD Open Systems Group wrote: > > Yes. Increasing the number of bytes per inode will reduce the number > > of inodes and thus reduce fsck time. Increasing the number of cylinders > > in a group will localize inodes into bigger chunks, reducing seeking > > and also thus reduce fsck time. > > Wouldn't that tend to generally reduce day-to-day performance as well? > I suspect that Kirk and co. at CSRG had a good reason for choosing the > defaults they did. I don't think you can generalise. It very much depends on what you're doing with your filesystem. Eg. an application writing only log-like data will exercise the FS quite differently from one where many small files are constantly being changed in a random manner, and it will again differ if you use your FS mostly read-only. Finally, this also depends on how the data is organised on disk (I'll only say "big directories"). cheers Michael -- Michael Schuster / Michael.Schuster@sun.com Sun Microsystems GmbH / Sonnenallee 1, D-85551 Heimstetten (+49 89) 46008-2974 / x62974 Recursion, n.: see 'Recursion' To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message