[Trilinos-Users] [EXTERNAL] Re: NOX output

[Pawlowski, Roger P]

There is a tool in the PIKE package in Trilinos that does exactly what you are asking for. It is meant for multiphysics coupling and creates communicators that segregate physics in subcommunicators (that can be separate or overallping) and corresponding FancyOStreams that are tagged with MPI process and application name:

Trilinos/packages/pike/blackbox/src/Pike_MultiphysicsDistributor.hpp
Trilinos/packages/pike/blackbox/src/Pike_MultiphysicsDistributor.cpp

Trilinos/packages/pike/blackbox/test/core/multiphysics_distributor.cpp

Roger

From: Andreas Kreienbuehl <akreienbuehl at lbl.gov>
Date: Friday, February 24, 2017 at 10:52 AM
To: Roger Pawlowski <rppawlo at sandia.gov>, "Prokopenko, Andrey (External Contacts)" <prokopenkoav at ornl.gov>
Cc: "trilinos-users at trilinos.org" <trilinos-users at trilinos.org>
Subject: Re: [EXTERNAL] Re: NOX output

Hi Roger:

Thank you very much for your reply!

My application manages multiple space communicators parallel in time. For each space communicator there is a corresponding NOX solver. I would like to prefix all time-parallel NOX solver output (one output processor per space communicator) by its corresponding MPI time rank and some additional application parameters.
In principle, both problems can be solved by passing `-output-filename <task-ID>' to OpenMPI's `mpirun'  (thank you, Andrey), `-outfile-pattern <task-ID>' to MPICH's `mpiexec', or `-o <task-ID>' to Slurm's `srun'. However, in this way the formatting might be suboptimal for post-processing. I will take another look at "FancyOStream" therefore.
Thank you again and have a great day,
Andreas
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