[Samba] GPFS on Linux exported via Samba to Windows Clients, locking issue

[Andrew Bartlett]

On Thu, 2012-05-24 at 13:52 -0400, Leonard Degollado wrote:
> I have a 3-node GPFS on Linux Cluster (3.4.0-12) with Samba 3.6.5
> The problem  is with file locking across the Cluster.
> Windows Client-1 maps the GPFS directory-1 from GPFS node-1 and initiates a
> Write of File-1
> Windows Client-2 maps the GPFS directory-1 from GPFS node-2 and should only
> have READ access but not Modify/Delete/Rename access to File-1.
> 
> However, Windows Client-2 is able to Modify, Delete and Rename File-1
> instead of being prevented by the locks.
> 
> If both Windows Clients (1 and 2) both map to GPFS node-1, the locking
> mechanism works as designed.  Client-2 can Read but cannot
> Modify/Delete/Rename File-1.
> What are all the required parameters that should be specified in the
> smb.conf file to enable the locking to work across the GPFS Cluster when
> various Clients map to different nodes?
> 
> I have defined and tested every smb locking parameter combination without
> any success.

Are you using CTDB?
https://wiki.samba.org/index.php/CTDB_Setup#IBMs_GPFS_filesystem

-- 
Andrew Bartlett                                http://samba.org/~abartlet/
Authentication Developer, Samba Team           http://samba.org