Samba and NFS server on same system using same filesystems

Jeremy Allison jra at
Thu Dec 8 21:37:08 UTC 2016

On Thu, Dec 08, 2016 at 02:06:30PM -0600, Ron Short wrote:
> Would I want to be looking at kernel oplocks in this situation?

I would avoid them if you can. If the apps can do
synchronization via another method that would be better.

> On 12/8/2016 14:03, Volker Lendecke wrote:
> >On Thu, Dec 08, 2016 at 10:20:59AM -0600, Ron Short wrote:
> >>This would be installed on a RHEL 6.7/8 system.  As far as I know, it's
> >>usage would be to provide the data to a 52 node cluster via NFS AND serve
> >>the XFS filesystem as Samba shares to the ~60 Windows workstations.
> >>
> >>Little is known about the actual applications/data to be used, but likely
> >>input files to simulation runs, output files and misc "stuff".  Expect that
> >>a subset of the compute nodes would be processing the data via NFS and the
> >>Windows workstations via Samba would be used for pre and post processing of
> >>the results.
> >As long as the applications do workflow coordination themselves,
> >you're probably okay. Things get intersting if some applications read
> >data that is still being written by the other protocol. Video ingest
> >and processing is very prone to doing that with all sorts of
> >performance and integrity issues.
> >
> >Volker
> -- 
> Ron Short                                       email: short at
> Solutions Architect                             office: 651/683-7542
> SGI Global Professional Services                fax: 651/683-5276

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