Soft-updates & du & df
Ivailo Tanusheff
i.tanusheff at procreditbank.bg
Thu Jul 14 07:55:59 GMT 2005
Hilco Wijbenga <hilco.wijbenga at elasticpath.com>
Sent by: owner-freebsd-questions at freebsd.org
07/14/2005 12:01 AM
To
freebsd-questions at freebsd.org
cc
Subject
Soft-updates & du & df
Hi,
I've taken over the administration of a FreeBSD box and now I've run
into a problem that I could not solve by means of Google or the FreeBSD
mailinglist archives. I am quite familiar with (Gentoo) GNU/Linux but a
complete newbie when it comes to FreeBSD.
While I was doing some work I got an error about a device being full. As
it turned out /var was completely full. Not a big problem because there
were a few very big log files that I could throw away. Problem solved?
Apparently not because
root at svn[var]# df -h /var
Filesystem Size Used Avail Capacity Mounted on
/dev/ad2s1d 248M 246M -18M 108% /var
even though
root at svn[var]# du -hs /var
43M /var
Shouldn't du and df roughly agree on the amount that's used/available?
/var is mounted using soft-updates
root at svn[var]# mount
/dev/ad2s1a on / (ufs, local)
devfs on /dev (devfs, local, multilabel)
/dev/ad2s1e on /tmp (ufs, local, soft-updates)
/dev/ad2s1f on /usr (ufs, local, soft-updates)
/dev/ad2s1d on /var (ufs, local, soft-updates)
/dev/gvinum/raid on /raid (ufs, local, soft-updates)
According to what I found using Google regarding soft-updates this means
that my changes are not written to disk immediately? Does that have
anything to do with this?
It looks like I didn't really solve the problem because if I try to copy
a fairly big file (say 2MB) to the /var/log directory I get another 'No
space left on device' even though there should now be about 200MB
available. I can create small files though.
How do I get du and df to agree again? Or do I have a different problem?
Please let me know if I left out any important information.
Bye,
Hilco
_______________________________________________
You can force the updates to be written to the disk using sync (8) for the
whole system or fsync on a specific files. Or you can just wait a while so
the updates are written to thr disk.
Ivailo Tanusheff
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