Maximun number of MPI communicator

[Loc_N_Intel]

Hello,

Please advice if there is a limitation of number of MPI communicator?

Thanks,
Loc

[James_T_Intel]

Hi Loc,

The maximum is currently 16381 communicators.

Sincerely,
James Tullos
Technical Consulting Engineer
Intel Cluster Tools

[Loc_N_Intel]

Hi James,

Thank you very much for your support.

Regards,
Loc

[AThar2]

Hello

Is this limit still the case? And is your answer based on the total number of communicators or the total number PER PROCESS?

[James_T_Intel]

The maximum is now 32000, and it is total communicators, not per process.