From owner-cvs-all Tue Mar 27 0:16:16 2001 Delivered-To: cvs-all@freebsd.org Received: from Awfulhak.org (awfulhak.demon.co.uk [194.222.196.252]) by hub.freebsd.org (Postfix) with ESMTP id 5602B37B719; Tue, 27 Mar 2001 00:16:10 -0800 (PST) (envelope-from brian@Awfulhak.org) Received: from hak.lan.Awfulhak.org (root@hak.lan.Awfulhak.org [172.16.0.12]) by Awfulhak.org (8.11.3/8.11.3) with ESMTP id f2R8GPT39153; Tue, 27 Mar 2001 09:16:25 +0100 (BST) (envelope-from brian@lan.Awfulhak.org) Received: from hak.lan.Awfulhak.org (brian@localhost [127.0.0.1]) by hak.lan.Awfulhak.org (8.11.3/8.11.3) with ESMTP id f2R8IWw48188; Tue, 27 Mar 2001 09:18:32 +0100 (BST) (envelope-from brian@hak.lan.Awfulhak.org) Message-Id: <200103270818.f2R8IWw48188@hak.lan.Awfulhak.org> X-Mailer: exmh version 2.3.1 01/18/2001 with nmh-1.0.4 To: "David E. O'Brien" Cc: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org, brian@Awfulhak.org Subject: Re: cvs commit: src/sbin/newfs newfs.c In-Reply-To: Message from "David E. O'Brien" of "Mon, 26 Mar 2001 17:34:59 -0800." <200103270134.f2R1Yxj90971@freefall.freebsd.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Tue, 27 Mar 2001 09:18:32 +0100 From: Brian Somers Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > obrien 2001/03/26 17:34:59 PST > > Modified files: > sbin/newfs newfs.c > Log: > The common wisdom is to use the largest number of cylinders per group. > So bump the default from `16' to `22', which is the largest value allowed > with the current default block size. This change increases the the > group size from 32MB/g to 44MB/g on a 4GB SCSI disk. Does this increase performance ? I'm just wondering what sort of threshold is optimum on a modern disk with a ficticious geometry.... do you have any numbers ? I would suspect the answer is ``yes performance is better'', but maybe some more exotic geometry would give more cylinders per group and even better performance ? > Revision Changes Path > 1.33 +5 -4 src/sbin/newfs/newfs.c -- Brian Don't _EVER_ lose your sense of humour ! To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message