Hi Gilles, all,
Using `OMPI_MCA_ess_singleton_isolated=true ./program` achieves the desired
result of establishing no TCP connections for a singleton execution.
Thank you for the suggestion!
Best regards,
-Dan
On Wed, Apr 17, 2019 at 5:35 PM Gilles Gouaillardet
wrote:
> Daniel,
>
>
> If your
Daniel,
If your MPI singleton will never MPI_Comm_spawn(), then you can use the
isolated mode like this
OMPI_MCA_ess_singleton_isolated=true ./program
You can also save some ports by blacklisting the btl/tcp component
OMPI_MCA_ess_singleton_isolated=true OMPI_MCA_pml=ob1
OMPI_MCA_btl=vad
Hi everyone,
I've been trying to track down the source of TCP connections when running
MPI singletons, with the goal of avoiding all TCP communication to free up
ports for other processes. I have a local apt install of OpenMPI 2.1.1 on
Ubuntu 18.04 which does not establish any TCP connections by d
