Hi Ralph, in this context, we are discussing a dynamic process approach based on PSets and PSet operations (see Additional PSET query/manipulation functions). The output of a PSet operation would be a list of PSet IDs that might refer to new processes and can be used to create new MPI groups/communicators. Regards, Dominik ________________________________ Von: mpiwg-sessions <[email protected]> im Auftrag von Ralph Castain via mpiwg-sessions <[email protected]> Gesendet: Donnerstag, 23. Januar 2025 19:03:06 An: Ralph Castain via mpiwg-sessions Cc: Ralph Castain Betreff: Re: [mpiwg-sessions] Topics for Sessions WG meeting 27th January 2025 Just curious - if you get rid of MPI_Comm_spawn, then how does one generate new processes? I assume some other API must replace it, so mostly wondering what that API is. FWIW: generating new processes without automatically connecting them to ZjQcmQRYFpfptBannerStart This Message Is From an External Sender This message came from outside your organization. ZjQcmQRYFpfptBannerEnd Just curious - if you get rid of MPI_Comm_spawn, then how does one generate new processes? I assume some other API must replace it, so mostly wondering what that API is. FWIW: generating new processes without automatically connecting them to the parent seems like a reasonable thing to do, so long as you provide back some info (e.g., a group ID or namespace) that allows you to do it later if you so choose. Ralph On Jan 23, 2025, at 8:09 AM, Pritchard Jr., Howard via mpiwg-sessions <[email protected]> wrote: This Message Is From an External Sender This message came from outside your organization. Hello Folks, Let me know if you have topics to discuss at our next Sessions WG meeting on Monday 1/27/25. I’ve attached some slides with ideas for discussion by the WG this calendar year. We can discuss these at the meeting. Thanks, Howard ------- <image001.png> Howard Pritchard Research Scientist HPC-ENV Los Alamos National Laboratory [email protected]<mailto:[email protected]> <image002.png><https://urldefense.us/v3/__https://www.instagram.com/losalamosnatlab/__;!!G_uCfscf7eWS!dLZH2GvrhX6Ru2BGAnNwOUO7o04EIQH910j1S2jzwC5bYSJ7ZGDKcNSFvACzOHfXI5i3_6kw84RO5h4Fu2aPJlHbqx1_Dzg$><image003.png><https://urldefense.us/v3/__https://twitter.com/LosAlamosNatLab__;!!G_uCfscf7eWS!dLZH2GvrhX6Ru2BGAnNwOUO7o04EIQH910j1S2jzwC5bYSJ7ZGDKcNSFvACzOHfXI5i3_6kw84RO5h4Fu2aPJlHbHTW9FRQ$><image004.png><https://urldefense.us/v3/__https://www.linkedin.com/company/los-alamos-national-laboratory/__;!!G_uCfscf7eWS!dLZH2GvrhX6Ru2BGAnNwOUO7o04EIQH910j1S2jzwC5bYSJ7ZGDKcNSFvACzOHfXI5i3_6kw84RO5h4Fu2aPJlHbu_BwyF4$><image005.png><https://urldefense.us/v3/__https://www.facebook.com/LosAlamosNationalLab/__;!!G_uCfscf7eWS!dLZH2GvrhX6Ru2BGAnNwOUO7o04EIQH910j1S2jzwC5bYSJ7ZGDKcNSFvACzOHfXI5i3_6kw84RO5h4Fu2aPJlHbv_qP29o$> <sessions_wg_01_27_24.pdf>_______________________________________________ mpiwg-sessions mailing list [email protected]<mailto:[email protected]> https://urldefense.us/v3/__https://lists.mpi-forum.org/mailman/listinfo/mpiw... <https://urldefense.us/v3/__https://lists.mpi-forum.org/mailman/listinfo/mpiwg-sessions__;!!G_uCfscf7eWS!ZUXQk_T8ELkSZSxGGEU3A_msZynZTIxWid0wkpBJN-watNzJbFOPW6aUULLRJy1Vgaq9m8TB4TM5k4uJOEkmgzY$>