There are two new options to mpiexec (-pwd and -savecreds) that allow you to provide the necessary credentials for launching processes using the launch service. The -pwd option allows specifying the password for the submitting users in non-interactive scenarios (e.g., using a script or scheduled task). In this case the password is provided in clear text. The -savecreds option causes the provided credentials (if specified with -pwd) to be securely stored on all the hosts specified in the mpiexec command line.
As another example, the following command will authenticate the user using the provided password, store it on the specified machines host1 and host2, then launch three processes, one on host1 and two on host2:
mpiexec –hosts 2 host1 1 host2 2 –wdir C:\MpiTests -pwd <password> -savecreds mpiapp.exe [parameters]
After you run mpiexec with the -savecreds option on a set of nodes, you do not have to provide the password on subsequent runs for those nodes unless the password is changed. If the user is running in interactive mode, mpiexec prompts for the password if the launch service is running and the password has not been provided or previously saved with the -savecreds option.
