My understanding is that MPI tasks will be launched inside a singularity
container.
In a typical environment, mpirun spawns an instance of the orted on each
node, and then each orted daemon (or mpirun on the local node) fork&exec
the MPI tasks (a.out)
With singularity, orted would fork&exec a container running a.out
(not sure if it is one container per task, or one container per node)
Cheers,
Gilles
On 12/10/2018 5:00 AM, Johnson, Glenn P wrote:
Greetings,
Could someone explain, or point to documentation that explains, what
the --with-singularity option enables with regard to OpenMPI support
for singularity containers?
Thanks.
Glenn Johnson
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