[cdwg] NFS export for Lustre 2.4.0

[Kevin Canady]

Cory,
If I heard correctly on the call, I had the impression that current NFS testing might be limited.  As part of this dialog, if it continues to have legs to be pursued, should there be some added action to explore the current level of testing and what would be desired?  How important is this feature to Cray?  Possibly other interested parties, endusers included might be able to assist with the testing side.  

Just a thought.

Kevin


On Jul 3, 2013, at 10:46 AM, Cory Spitz <spitzcor at cray.com> wrote:

> Sure.  NFS (v3) export seems to be flat broken when the MDS is at 2.4.0.  Our other issues seem to be more related to 3.x kernels or SLES 11 SP2 specific (which is a 3.0 kernel).  We haven't done a lot testing of NFS v4, but I assume that it has a all of the same problems and possibly more.
> 
> See:
> LU-3550 - Stale file handle on mount when mounting Lustre 2.4 via NFS
> LU-3544 - Writing to new files under NFS export from Lustre will result in ENOENT (SLES11SP2)
> LU-3486 - LBUG when exporting Lustre 2.4 via NFS on SLES11SP2: ll_dops_init: ASSERTION( de->d_op == &ll_d_ops ) failed
> LU-3484 - Incorrect identification of anonymous dentry as root under SLES11SP2
> LU-3483 - Null pointer dereference in ll_revalidate_nd (llite/dcache.c) in an NFS mounted Lustre file system
> 
> Patrick Farrell from Cray has been working on these tickets and he may be able to chime in with more detail if you are interested.
> 
> Thanks,
> -Cory
> 
> From: Nic Henke <nic_henke at xyratex.com>
> Date: Wednesday, July 3, 2013 12:04 PM
> To: Cory Spitz <spitzcor at cray.com>
> Cc: "cdwg at lists.opensfs.org" <cdwg at lists.opensfs.org>
> Subject: NFS export for Lustre 2.4.0
> 
>> Cory - could you say more about the bugs you found in NFS exporting with Lustre 2.4 ?
>> 
>> Cheers,
>> Nic
>> Nicholas Henke • Senior Filesystem Developer
>> Xyratex
>> office: +1 (651)842 8471 • mobile: +1 (651)895 5795
>> www.xyratex.com
>> Connect with Xyratex
>> 
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