Date: Sun, 06 May 2007 22:07:57 +0100 From: Richard Tector <richardtector@thekeelecentre.com> To: freebsd-stable@freebsd.org Subject: 6.2 newfs/tunefs minfree Message-ID: <463E43AD.4030105@thekeelecentre.com>
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On 6.2-STABLE,
newfs(8) manpage reports:
-o optimization
[..snip..]
If the value of min-free (see above) is less than 8%, the default is to
optimize for space; if the value of minfree is greater than or equal to
8%, the default is to optimize for time.
However, tunefs(8) manpage reports:
-m minfree
Specify the percentage of space held back from normal
users; the minimum free space threshold. The default value used is 8%.
Note that lowering the threshold can adversely affect performance:
o Settings of 5% and less force space optimization to always be used
which will greatly increase the overhead for file writes.
Am I correct in assuming therefore that if min-free is set to less than
8% but optimization is set to time, the time method will still be used
until the free space on the fs reaches 5% at which point it will force
the 'space' method to be used?
Or, is this a mixup in the documentation?
Or, am I just reading it wrong?
Regards,
Richard
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