File system performance

[Conor P. Cahill]

In article <1990Nov3.124110.2155 at metro.ucc.su.OZ.AU> dawes at 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.,
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