Date: Sun, 27 Jan 2002 19:17:12 -0800 From: David Schultz <dschultz@uclink.Berkeley.EDU> To: Terry Lambert <tlambert2@mindspring.com> Cc: "Gary W. Swearingen" <swear@blarg.net>, freebsd-chat@FreeBSD.ORG Subject: Re: Bad disk partitioning policies (was: "Re: FreeBSD Intaller (was "Re: ... RedHat ...")") Message-ID: <20020127191712.A825@HAL9000.wox.org> In-Reply-To: <3C54A24B.B0B607F@mindspring.com>; from tlambert2@mindspring.com on Sun, Jan 27, 2002 at 04:58:51PM -0800 References: <15441.17382.77737.291074@guru.mired.org> <p05101245b8771d04e19b@[10.0.1.3]> <20020125212742.C75216@over-yonder.net> <p05101203b8788a930767@[10.0.1.14]> <gc1ygc7sfi.ygc@localhost.localdomain> <3C534C4A.35673769@mindspring.com> <0s3d0s5dos.d0s@localhost.localdomain> <3C53ED01.61407A02@mindspring.com> <ffbsffnwfp.sff@localhost.localdomain> <3C54A24B.B0B607F@mindspring.com>
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Thus spake Terry Lambert <tlambert2@mindspring.com>: > "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
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