Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!virtech!cpcahil
From: cpcahil@virtech.uucp (Conor P. Cahill)
Newsgroups: comp.unix.sysv386
Subject: Re: File system performance
Message-ID: <1990Nov03.193936.665@virtech.uucp>
Date: 3 Nov 90 19:39:36 GMT
References: <294@audfax.audiofax.com> <1990Nov3.124110.2155@metro.ucc.su.OZ.AU>
Reply-To: cpcahil@virtech.UUCP (Conor P. Cahill)
Organization: Virtual Technologies Inc., Sterling VA
Lines: 18

In article <1990Nov3.124110.2155@metro.ucc.su.OZ.AU> dawes@suphys.physics.su.OZ.AU (David Dawes) writes:
>I too am using ESIX rev D with ffs.  One of my file systems became heavily
>fragmented, and got to the point where there were 0 free blocks, and
>5000 free frags.  df reported 10000 blocks free, but attempting to write
>to the file system resulted in "Disk full" errors.  This meant that I
>had an unusable 5MB on a 65MB file system. (BTW, there were plenty of free
>inodes.)

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.  This 
is because the performance of the system is supposed to degrade substantially
when you go over 90% utilization.


-- 
Conor P. Cahill            (703)430-9247        Virtual Technologies, Inc.,
uunet!virtech!cpcahil                           46030 Manekin Plaza, Suite 160
                                                Sterling, VA 22170