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Date:      Fri, 17 Nov 2000 01:29:22 -0600 (CST)
From:      Mike Meyer <mwm@mired.org>
To:        Mark Garcia <markg@skritz.go2net.com>
Cc:        Mike Meyer <mwm@mired.org>, Chris Jesseman <whacker@sitemajic.net>, questions@freebsd.org
Subject:   Re: du -df inconsistency - get fsck to fix?
Message-ID:  <14868.56914.94548.607710@guru.mired.org>
In-Reply-To: <Pine.LNX.3.96.1001116231438.12065D-100000@skritz.go2net.com>
References:  <14868.55554.177193.778788@guru.mired.org> <Pine.LNX.3.96.1001116231438.12065D-100000@skritz.go2net.com>

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Mark Garcia <markg@skritz.go2net.com> types:
> On Fri, 17 Nov 2000, Mike Meyer wrote:
> 
> > Chris Jesseman <whacker@sitemajic.net> types:
> > > I did have an open file but trashing it didn't help. I'm just curious if this 
> > > is on a lower file system level or would restarting the offending logger 
> > > release the space? I really don't want to reboot...
> > 
> > What do you mean by "trashed"? Files aren't removed from the file
> > system until the last link to them is broken. Rm on a file just breaks
> > one link. If a process has an open file descriptor pointing at the
> > file, *that's* also a link - and the file won't go away until the
> > process closes the link.
> > Stopping a processes closes all open files, so restarting a server
> > should work.

My bad - I wasn't very clear. By "server", I meant the server process
with the open log file, not the hardware that software is running on.

> I'd hope it work <snicker>  Actually, restarting the server is an arcane
> way of handling this.  Its probably the easiest and most intrusive way of
> telling the kernel to go stuff yourself and forget about what you were
> doing.  Rather, you should umount the partition, run fsck -p on it, choose
> 'yes' to the appropriate inode to clear, and then remount.

No, restarting a server that has an open log file filling a partition
isn't an arcane way of handling this, it's SOP. The kernel isn't
involved at all, except that once the file closes, it will notice
there are no longer any links to it, and free the disk space.

The problem with your solution is that - if I've diagnosed the problem
correctly - you won't be able to unmount the disk until the file is
closed anyway. At which time, the problem is fixed, so why bother
going through all that extra work?

	<mike

> > > Thanks much you guys help!
> > > Chris Jesseman
> > > > 
> > > > Well, "optimal" depends on your goals.  Looks like you've got a server
> > > > log file you rm'ed from the file system, but the server is still
> > > > logging to it. You need to convince the server to close the log file,
> > > > which will cause it to be removed from the disk. If worst comes to
> > > > worst, doing a shutdown and reboot will solve the problem.
> > > > 
> > > > 	<mike
> > > 
> > > > 
> > > > 
> > > > > Thank you,
> > > > > Chris Jesseman
> > > > > 
> > > > > [0] /var#fsck  /dev/da0s1e
> > > > > ** /dev/da0s1e (NO WRITE)
> > > > > ** Last Mounted on /var
> > > > > ** Phase 1 - Check Blocks and Sizes
> > > > > ** Phase 2 - Check Pathnames
> > > > > ** Phase 3 - Check Connectivity
> > > > > ** Phase 4 - Check Reference Counts
> > > > > UNREF FILE I=94  OWNER=root MODE=100644
> > > > > SIZE=18173952 MTIME=Nov 15 22:09 2000 
> > > > > CLEAR? no
> > > > > 
> > > > > ** Phase 5 - Check Cyl groups
> > > > > 55 files, 17867 used, 1948 free (108 frags, 230 blocks, 0.5%
> > > > fragmentation)
> > > > > 
> > > > > 
> > > > > Misc. info from my 4.1.1 Stable box:
> > > > > 
> > > > > [0] /var#fsck -p /dev/da0s1e
> > > > > /dev/da0s1e: NO WRITE ACCESS
> > > > > /dev/da0s1e: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.
> > > > > 
> > > > > [8] /var#cat /etc/fstab
> > > > > # Device                Mountpoint      FStype  Options         Dump  
> > > >  Pass#
> > > > > /dev/da0s1e             /var            ufs     rw              2     
> > > >  2
> > > > > 
> > > > > [0] /var#mount
> > > > > /dev/da0s1e on /var (ufs, local, writes: sync 1486005 async 715463,
> > > > reads: sync 
> > > > > 20046 async 6527)
> > > > > 
> > > > > [0] /var#du -h /var
> > > > > 1.0K    /var/at/jobs
> > > > > 1.0K    /var/at/spool
> > > > > 3.0K    /var/at
> > > > > 2.0K    /var/crash
> > > > > 4.0K    /var/cron/tabs
> > > > > 5.0K    /var/cron
> > > > > 2.0K    /var/msgs
> > > > > 1.0K    /var/preserve
> > > > >  52K    /var/run
> > > > > 1.0K    /var/rwho
> > > > > 1.0K    /var/tmp/vi.recover
> > > > > 3.0K    /var/tmp
> > > > >  20K    /var/yp
> > > > > 1.0K    /var/pwcheck
> > > > >  91K    /var
> > > > > [0] /var#df -H
> > > > > Filesystem    Size   Used  Avail Capacity  Mounted on
> > > > > /dev/da0s1e    20M    18M   372K    98%    /var
> > > > > 
> > > > > 
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> > > > 
> > > 
> > 
> > 
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> 


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