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List:       freebsd-chat
Subject:    Re: Bad disk partitioning policies (was: "Re: FreeBSD Intaller (was "Re: ... RedHat ...")")
From:       David Schultz <dschultz () uclink ! Berkeley ! EDU>
Date:       2002-01-28 3:17:12
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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.

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