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For running mpi jobs on the S3DF slurm cluster mpirun (or related tools) should be used. Using srun to run mpi4py will fail as it requires pmix which is not supported by the Slurm version. Example psana MPI submission scripts are here: Submitting SLURM Batch Jobs
Jupyter is provided by the onDemand service (We are not planning to run a standalone jupyterhub as is done at PCDS. For more information check the S3DF interactive compute docs).
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