Differences

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--- howto:start [2026/02/20 09:48]
ccrosby
+++ howto:start [2026/02/24 10:42] (current)
ccrosby [Using the Intel compilers]
@@ Line 67: / Line 67: @@
 export MPIF77=mpiifx
 export MPIF90=mpiifx
+export I_MPI_HYDRA_BOOTSTRAP=ssh
 </code>
-It is not necessary to use a machinefile for multi-node MPI runs.  However, the default bootstrap method using pbsdsh does not work.  It is necessary to set the bootstrap method to ssh.  This is a typical command mpi run command:
+It is not necessary to use a machinefile for multi-node MPI runs.  However, the default bootstrap method using pbsdsh does not work, hence the need to set ''I_MPI_HYDRA_BOOTSTRAP''.  This is a typical command mpi run command:
 <code>
-mpirun -np 96 -bootstrap ssh myMPIprogram.exe
+mpirun -np 96 myMPIprogram.exe
 </code>

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