[gpfsug-discuss] GPFS magic options for Samba

Jonathan Buzzard j.buzzard at dundee.ac.uk
Wed May 9 16:47:25 BST 2012

Not documented, but I believe there are four ;-)


 From what I can determine they are binary on/off options. For example 
you enable the first with

     mmchconfig allowSambaCaseInsensitiveLookup=yes

I am guessing but I would imagine when the first is turned on, then when 
Samba tries to lookup a filename GPFS will do the case insensitive 
matching for you, which should be faster than Samba having to do it. You 
should obviously have case sensitive = no in your Samba config as well.

The cifsBypassTraversalChecking is explained in the SONAS manual page 
for chcfg, and I note it is on by default in SONAS.


Some Googling indicates that NetApp and EMC have options for bypass 
traverse checking on their filers, so something you probably want to 
turn on.

The other two sound fairly self explanatory, but the question is why 
would you want them turned on. Any one any ideas?


Jonathan A. Buzzard             Tel: +441382-386998
Storage Administrator, College of Life Sciences
University of Dundee, DD1 5EH

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