Re: XFS NFS server Oops

[Steve Lord <lord@sgi.com>]

On Tue, 2002-03-19 at 16:36, Ian D. Hardy wrote:
> > 
> > OK, this is something else, and I just had a brainwave about your old
> > oops though, I think you have a really fragmented file out there. Can
> > you run this on your filesystem:
> > 
> > xfs_db -r /dev/xxx (it can be mounted)
> > xfs_db: frag -f
> > 
> > and send me the output.
> > 
> > Someone reported a problem in the memory allocation code the other day,
> > and maybe, just maybe, you are hitting it.
> > 
> > Steve
> > 
> > 
> 
> # xfs_db -r /dev/md0
> xfs_db: frag -f
> actual 994261, ideal 811677, fragmentation factor 18.36%

So now try this:

xfs_fsr -v /dev/md0

it will report the files it defragments, look for something 
with a really large number of extents in the before column.

Steve

> 
> Thanks 
> 
> Ian
> -- 
> 
> ////////////////////////////////////////////////////////////////////////////
> Ian Hardy                                   
> Research Services                           
> Computing Services                          email: idh@soton.ac.uk    
> Southampton University                             i.d.hardy@soton.ac.uk
> Southampton  S017 1BJ, UK.
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-- 

Steve Lord                                      voice: +1-651-683-3511
Principal Engineer, Filesystem Software         email: lord@sgi.com