Ok, I got more issues. Maybe someone on the list can help me: Open MPI version: 4.1.1 download from github source Compile on Centos 8.4 using GCC 8.4.1 Configured is:
./configure --enable-shared --enable-static \ --without-tm \ --enable-mpi-cxx \ --enable-wrapper-runpath \ --enable-mpirun-prefix-by-default \ --enable-mpi-thread-multiple \ --enable-mpi-fortran=yes \ --prefix=/p/app/compilers/mpi/openmpi/4.1.1 2>&1 \ | tee config.log Intel HPC system, 850 nodes trying to launch IOR benchmark. Top portion of the mpi command: ------------------------------------------------------------------------------------- export OMPI_MCA_btl_openib_allow_ib=1 export OMPI_MCA_btl_openib_if_include="mlx5_0:1" mpirun -machinefile ${hostlist} \ --mca opal_common_ucx_opal_mem_hooks 1 \ \ -np ${NP} \ --map-by node \ -N ${rpn} \ -vv \ --------------------------------------------------------------------------------------------------------- I am getting the message <node name:pid> [##] mca_sharedfp_lockedfile_file_open : Error during file open on all the nodes. I've tried it with the --mca sharedfp lockedfile and without, I still get the errors. What Have I done wrong ? Thanks .. Ben Duncan -