[mpich-discuss] Maximum number of processes in compute farm

Shuwei Zhao shuweizhao1991 at gmail.com
Mon Oct 29 15:33:32 CDT 2018

Hi, all

I have several questions about parallel scale of mpich:

Is there a hard limit on the number of processes that mpich can start in a
compute farm?
As the number of process going up , for a large-scale(1000-10000)
loose-communication application(the communication overhead is minimal
compared to the runtime), is it possible that the performance of the mpich
will go down because the message passing will take longer time?

Thank you very much,
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