[Lustre-discuss] Root Squash

[Andreas Dilger]

On 2010-11-26, at 01:46, Deon Borman wrote:
> I'm running Lustre 1.8.4 and configured root squash as follows on the 
> MDS/MGS:
> 
> tunefs.lustre --param "mdt.rootsquash=1500:513" --param 
> "mdt.nosquash_nid=192.168.0.29 at tcp0" /dev/sdb
> 
> It's working as expected, but I find myself in a position where it would 
> be convenient to have an extra client with no root squashing. However, 
> as far as I can determine from the manual, there's no way to configure 
> multiple NIDs. Experimenting with lctl set_param seems to verify my 
> suspicions. Am I missing something, or am I really limited to only one NID?

It is only possible to have a single nosquash NID today.

It would be fairly straight forward to add support for a short list of client NIDs, but Eric Barton previously expressed performance concerns for any complex sets of nodes (e.g. subnet masks and such), so that is not currently available. 

Cheers, Andreas
--
Andreas Dilger
Lustre Technical Lead
Oracle Corporation Canada Inc.