I asked this before but did not receive a reply. Now with openmpi 5, I tried doing this with prte-default-hostfile and rmaps_default_mapping_policy = node:OVERSUBSCRIBE but I still get the same behavior: openmpi always wants rank 0 to be localhost. Is there a way to override this and set ranks by machine order in hostfile? Thanks. ________________________________ From: Saurabh T Sent: Monday, November 6, 2023 10:44 AM To: Openmpi <users@lists.open-mpi.org> Subject: Avoiding localhost as rank 0 with openmpi-default-hostfile
My openmpi-default-hostfile has host1 slots=4 host2 slots=4 host0 slots=4 and my openmpi-mca-params.conf has rmaps_base_mapping_policy = node rmaps_base_oversubscribe = 1 If I invoke orterun -np 3 on host0, it puts rank0 on host0, rank1 on host1, rank2 on host2. I want it to put rank0 on host1, rank1 on host2, rank2 on host0 (as specified in the host file). I cannot use nolocal because I do want it to run on host0. How can localhost being rank0 be avoided without using -H? Thanks, saurabh To unsubscribe from this group and stop receiving emails from it, send an email to users+unsubscr...@lists.open-mpi.org.
