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Re: XFS weirdness

To: Jason Walker <unseen@xxxxxxxxx>
Subject: Re: XFS weirdness
From: Sean Dougherty <sean@xxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 28 Feb 2001 16:28:51 -0600 (CST)
Cc: linux-xfs@xxxxxxxxxxx
In-reply-to: <Pine.LNX.4.10.10102281453120.10899-100000@surreal.localdomain>
Sender: owner-linux-xfs@xxxxxxxxxxx

On Wed, 28 Feb 2001, Jason Walker wrote:

> 
> Just a little FYI, EXT2 does not have a 2GB file size limit on 2.4.x
> kernels.  Perhaps trying the same thing with ext2 would help determine the
> problem.  I didn't beleive it when people said I coudl make larger files on
> ext2, so I tried it myself. and indeed, they were right! I hope this help
> you figure out the real source of the problem.

right you are.  I am running the tests now...and so far (about 20G moved 
so far...little files and big ones) and no problems with the ext2 system.

Samba, proved to be a different joy.  Using smbtar (I do seem fixated on 
tar tests :-)) I can get the same "cant stat ." error after a run of 
smbtar errors.  But not at the same point or time (oh and I am testing 
several machines at once here).  But so far the smbtar is running ok on ext2.
(moved about 10G).  Also 2 twice the smbtar seemed to finish correctly on 
the xfs volumn, but untaring the resulting file failed with tar read 
errors...now this might just be a tarism...I am not to a point to test 
the ext2 yet.

I am not sure if someone that knows infinately more than I do wants 
specific log information or debug information to see if this is really an 
xfs problem...I do plan to keep testing different combinations.

Thanks for the tip Jason.
Sean

> 
> RegEx
> 
> On Wed, 28 Feb 2001, Sean Dougherty wrote:
> 
> > 
> > This might be an xfs issue or not.  I am not sure.  The following only 
> > seems to happen when I have files over 2G in size, hence I only see it 
> > on the XFS partitions.
> > 
> > I am using the cvs as of 2/27/01.  Any partitions are created with
> > 
> > mkfs -t -f -d unwritten=0 -l size=32768b /dev/hdxx
> > they are mounted with
> > mount -t -o logbufs=4,logbsize=32768 /dev/hdxx /xfs
> > 
> > these are ide drives with both dma and multi count on (all maxtor drives 
> > at the moment)
> > 
> > I create a directory under /xfs called test then export /xfs/test as an 
> > NFS file system to a sun box 5.8 (I have nfs3 compiled in the kernel of 
> > the xfs box).  Now it gets weird.
> > 
> > >From the sun box I nfs mount xfs-server:/xfs/test to /testxfs that works 
> > >fine
> > from the sun box I tar some files to the /testxfs.  All is fine and 
> > dandy...then at some point, and no it never happens at the same place twice,
> > the tar dies with a write error. usually rpc timeout.  
> > 
> > >From the sun box I do a df or an ls of /testxfs and after a fashion I get 
> > another rpc timeout.  But on the xfs-server, if I cd to /xfs/test and try 
> > to do an ls 9 times out of 10 ls will hang.  Nothing short of rebooting 
> > the box will bring it back.  Also nfs is also hung (cannot kill rpc.nfsd).
> > The 10th time though I get from the ls "cannot stat ." also nfs if hung.  
> > After this reboot I have to do an xfs_repair.  One of the many strange 
> > things is, I can ls /xfs all day...it is just the /xfs/test that is broken.
> > 
> > Has anyone else seen this?  Does anyone have any ideas.
> > 
> > I have tried with ext2 file systems and they seem to work...but again I 
> > never move a 2G+ file to them.
> > 
> > I am checking with samba next to see if this is an nfs ism.
> > 
> > Sean
> > Manager of way too much
> > TTUHSC At Amarillo
> > sean@xxxxxxxxxxxxxx
> > 
> 
> -- 
> Jason Walker -- unseen@xxxxxxxxx
> 
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