[ale] Re: 1/3 full disk, but it is full?

[Bao C. Ha]

A journalling filesystem usually adds the changes by appendding
in a log file manner.  It allows roll-backs if the writes to the
disk are unsuccessful, like in cases of power-failure.  Then,
periodically, the filesystem performs a garbage-collection to
return these spaces into the free pool.  In JFFS2, you can 
trigger a GC to reclaim the space of successful writes by 
sending SIGSTART to the gc-thread.  There may be a similar 
mechanism in Reisertfs.

Bao

> -----Original Message-----
> From: owner-ale at ale.org [mailto:owner-ale at ale.org]On Behalf Of
> hirsch at zapmedia.com
> Sent: Tuesday, July 10, 2001 9:13 AM
> To: darjo at arches.uga.edu
> Cc: hirsch at zapmedia.com; ale at ale.org
> Subject: [ale] Re: 1/3 full disk, but it is full?
> 
> 
> darjo at arches.uga.edu writes:
>  > I've seen this a lot of times when files are deleted from 
> a running process 
>  > such as syslog.  Restart all the processes that access the 
> partition and see 
>  > if that helps.
> 
> Well, I've rebooted the machine.  (That restarts all processes,
> right?)  Somehow that freed up about 6 gig of free space.  There are
> no logs kept on this partition, so I don't know what got freed up.
> There are still 14 gig that have mysteriously vanished.
> 
> I'm wondering if it is the Reiserfs transaction log doing something
> weird.
> 
> --Michael
> 
>  > 
>  > Clint Ricker
>  > System Administrator
>  > NorthEast Georgia Internet Acess 
>  > 
>  > 
>  > > Anyone ever seen this?  I have a disk partition that 
> claims to be full
>  > > when I run df on it. 
>  > > 
>  > > [zap at zapstation /Assets]$ df -h .
>  > > Filesystem            Size  Used Avail Use% Mounted on
>  > > /dev/hda8              26G   26G  1.9M 100% /Assets 
>  > > 
>  > > But when I run du it is less than 1/3 full! 
>  > > 
>  > > [zap at zapstation /Assets]$ du -hs .
>  > > 8.0G    . 
>  > > 
>  > > It's a reiserfs file system with kernel 2.4.3.   
>  > > 
>  > > I'm very confused. 
>  > > 
>  > > --Michael
>  > > --
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> 
> 
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