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Local Hydra Options
This section describes the local options of the Intel® MPI Library's Hydra process manager. Local options are applied only to the argument set they are specified in. Argument sets are separated by a colon ':'.
-n <number-of-processes> or -np <number-of-processes>
Use this option to set the number of MPI processes to run with the current argument set.
-env <envar> <value>
Use this option to set the <envar> environment variable to the specified <value> for all MPI processes in the current argument set.
-envall
Use this option to propagate all environment variables in the current argument set. See the I_MPI_HYDRA_ENV environment variable for more details.
-envnone
Use this option to suppress propagation of any environment variables to the MPI processes in the current argument set.
NOTE:
The option does not work for localhost.
-envexcl <list-of-envvar-names>
Use this option to suppress propagation of the listed environment variables to the MPI processes in the current argument set.
-envlist <list>
Use this option to pass a list of environment variables with their current values. <list> is a comma separated list of environment variables to be sent to the MPI processes.
-host <nodename>
Use this option to specify a particular <nodename> on which the MPI processes are to be run. For example, the following command executes test.exe on hosts host1 and host2:
> mpiexec -n 2 -host host1 test.exe : -n 2 -host host2 test.exe
-path <directory>
Use this option to specify the path to the <executable> file to be run in the current argument set.
-wdir <directory>
Use this option to specify the working directory in which the <executable> file runs in the current argument set.
Parent topic: mpiexec.hydra