Re: Weird behaviour with project quotas

[Dave Chinner <david@fromorbit.com>]

On Fri, Nov 29, 2024 at 10:33:32AM +0100, Emmanuel Florac wrote:
> Le Fri, 29 Nov 2024 08:07:09 +1100
> Dave Chinner <david@fromorbit.com> écrivait:
> 
> > > As far as I understand, and from my tests, on folders on which a
> > > project quota is applied, either the available quota or the actually
> > > avialable space should be reported when using "df".  
> > 
> > Only if you are using project quotas as directories quotas. i.e.
> > the directory you are querying with df needs to have the
> > XFS_DIFLAG_PROJINHERIT flag set on it for df to behave this way.
> 
> Interesting, and how is this set ? I basically set up quotas using
> something like
> 
> xfs_quota -x -c 'project -s -p /mnt/raid/project1 10' /mnt/raid
> 
> xfs_quota -x -c "limit -p bhard=30000g 10" /mnt/raid

That should set it up appropriately, hence the need to check if it
has actually been set up correctly on disk.

> > > However on a
> > > running system (Debian 12, kernel 6.1 Debian) I have incoherent
> > > results:  
> > 
> > 32 bit or 64 bit architecture?
> 
> AMD64, the most common one.
>  
> > > The volume /mnt/raid is 100 TB and has 500GB free.
> > > 
> > > There are several folders like /mnt/raid/project1,
> > > /mnt/raid/project2 etc with various quotas (20TB, 30TB, etc).  
> > 
> > Output of df and a project quota report showing usage and limits
> > would be useful here.
> > 
> > Then, for each of the top level project directories you are querying
> > with df, also run `xfs_io -rxc "stat" <dir>` and post the output.
> > This will tell us if the project quota is set up correctly for df to
> > report quota limits for them.
> > 
> > It would also be useful to know if the actual quota usage is correct
> > - having the output of `du -s /mnt/raid/project1` to count the
> > blocks and `find /mnt/raid/project1 -print |wc -l` to count the
> > files in quota controlled directories. That'll give us some idea if
> > there's a quota accounting issue.

iAnother thought occurred to me - can you also check that
/etc/projid and /etc/projects is similar on all machines, and post
the contents of them from the bad machine?

> OK, I'll run these as soon as I have a connection to the system. There
> seemed to be no error with the reported used space though, only
> available remaining space in quota'ed directories; however df reports
> actually available space for directories without quota set.

Ok - it would be helpful to post the commands you run and the output
so that we both know exactly what behaviour you are seeing.

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com