"Schlottke-Lakemper, Michael" <m.schlottke-lakem...@aia.rwth-aachen.de>
writes:

> Hi folks,
>
> We are currently encountering a weird file coherence issue when
> running parallel jobs with OpenMPI (1.8.7) and writing files in
> parallel to an NFS-mounted file system using Parallel netCDF 1.6.1
> (which internally uses MPI-I/O). Sometimes (~30-40% of our samples) we
> get a file whose contents are not consistent across different hosts.

That's probably not a good idea.  Have you read about NFS in the romio
README?  It's old, but as far as I know, it's still relevant for NFS3.
Maybe Rob Latham will see this and be able to comment on NFS4.

It seems to me that building for NFS by default is a mistake.

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