From owner-freebsd-chat Sun Jan 27 19:15:15 2002 Delivered-To: freebsd-chat@freebsd.org Received: from HAL9000.wox.org (12-232-222-90.client.attbi.com [12.232.222.90]) by hub.freebsd.org (Postfix) with ESMTP id 3881337B400 for ; Sun, 27 Jan 2002 19:15:12 -0800 (PST) Received: (from dschultz@localhost) by HAL9000.wox.org (8.11.3/8.11.3) id g0S3HCS00928; Sun, 27 Jan 2002 19:17:12 -0800 (PST) (envelope-from dschultz) Date: Sun, 27 Jan 2002 19:17:12 -0800 From: David Schultz To: Terry Lambert Cc: "Gary W. Swearingen" , freebsd-chat@FreeBSD.ORG Subject: Re: Bad disk partitioning policies (was: "Re: FreeBSD Intaller (was "Re: ... RedHat ...")") Message-ID: <20020127191712.A825@HAL9000.wox.org> Mail-Followup-To: Terry Lambert , "Gary W. Swearingen" , freebsd-chat@FreeBSD.ORG References: <15441.17382.77737.291074@guru.mired.org> <20020125212742.C75216@over-yonder.net> <3C534C4A.35673769@mindspring.com> <0s3d0s5dos.d0s@localhost.localdomain> <3C53ED01.61407A02@mindspring.com> <3C54A24B.B0B607F@mindspring.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3C54A24B.B0B607F@mindspring.com>; from tlambert2@mindspring.com on Sun, Jan 27, 2002 at 04:58:51PM -0800 Sender: owner-freebsd-chat@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Thus spake Terry Lambert : > "Gary W. Swearingen" wrote: > > So it should say that performance degrades increasingly from negligible > > at 85% of the full FS to about 3 times slower near 100% full (plus > > increased permanent fragmentation of files). And that this is a result > > of the algorithms used and is independent of FS size. And this needs > > complication to mention the effects of the 5% switch and -o option. > > Sure. Let's see if other people agree with that; it's a bit > simplistic, in that you don't know whether the degradation > is linear or exponential (exponential), and even saying that > raises more questions from people who want to have knowledge > given to them, instead of having to learn it (such people > should have slots installed into their skulls before they > come bother us, wince without a means of "giving" it to them > like slotting a skills card into their brain, they are > wasting their time. 8-)). I didn't used to understand that comment in tunefs(8) until you mentioned the word `hash'. (Actually, it coincided nicely to my reaching the FFS chapter in the 4.4 BSD book.) All that's needed is a one- or two-sentence comment in the manpage explaining the cause and nature of the limitation. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message