[MOAB-dev] writing in parallel

[Vijay S. Mahadevan]

Hi Nico,

Yes write_mesh is implemented to work only in serial. It internally
just calls write_file but with NULL options [1]. I believe write_mesh
exists typically for debug purposes where we can dump the partial mesh
from each process and analyze it. I don't see why this should be
restricted this way and can certainly change that. Alternately, you
can and should directly call write_file (which can store tags and
other set data too) with options="PARALLEL=WRITE_PART;".

Iulian, we should update the documentation to say that write_mesh only
works in serial. Or optionally allow user to specify options so that
both serial/parallel writes can be enabled. Also, the documentation
for load_file and write_file should describe what typical options can
be used to read/write in parallel.

Vijay

[1] http://www.mcs.anl.gov/~fathom/moab-docs/html/classmoab_1_1Core.html#afa9715e0c6aef68eb7bb84407cf15a5e

On Sat, Jan 2, 2016 at 8:42 AM, Nico Schlömer <nico.schloemer at gmail.com> wrote:
> Hi everyone,
>
> I'm trying to write a mesh in parallel with write_mesh [1]. Unfortunately,
> it appears that only one process actually writes the file (or the other
> portions are overridden). I see there is also write_file [2]; haven't tried
> it yet.
>
> Anything I should know?
>
> Cheers,
> Nico
>
>
> [1]
> http://www.mcs.anl.gov/~fathom/moab-docs/html/classmoab_1_1Interface.html#a4d4d0fa72b9578bfd6f2ec8410fe207c
> [2]
> http://www.mcs.anl.gov/~fathom/moab-docs/html/classmoab_1_1Interface.html#a96c55cc351c6d44b88330a2bf692996b