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From: dawes@suphys.physics.su.OZ.AU (David Dawes)
Newsgroups: comp.unix.sysv386
Subject: Re: File system performance
Message-ID: <1990Nov5.105902.20756@metro.ucc.su.OZ.AU>
Date: 5 Nov 90 10:59:02 GMT
References: <294@audfax.audiofax.com> <1990Nov3.124110.2155@metro.ucc.su.OZ.AU> <1990Nov03.193936.665@virtech.uucp> <2239@jwt.UUCP>
Reply-To: dawes@suphys.physics.su.OZ.AU (David Dawes)
Organization: School of Physics, Uni of Sydney, Australia.
Lines: 20
Nntp-Posting-Host: suphys.physics.su.oz.au

In article <2239@jwt.UUCP> john@jwt.UUCP (John Temples) writes:
>In article <1990Nov03.193936.665@virtech.uucp> cpcahil@virtech.UUCP (Conor P. Cahill) writes:
>>If the ESIX ffs is a BSD file system, the file system code will only
>>allow the super user to write to the last 10% of the partition.
>
>Yes, this is how the ESIX FFS works.  The 10% figure is a default
>which can be configured when you make the file system.

I have found that ESIX FFS with less than 10% free space can still be written
to by a non-super user.  ffsdump shows the minfree parameter, but it doesn't
seem to be doing anything.  Also all BSD df's I've seen show disk usage as a
percentage of (total space - min free space) -- so the max usage is 110% for
the default minfree.  Esix df doesn't work like this.

David
--
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 David Dawes (dawes@suphys.physics.su.oz.au) DoD#210   | Phone: +612 692 2639
 School of Physics, University of Sydney, Australia    | Fax:   +612 660 2903
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