Mpi support#42
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dask-mpi + mpi4py, optional so pip install -e . stays MPI-free. Co-Authored-By: Claude <noreply@anthropic.com>
PSC_PLOT_DASK_SCHEDULER=mpi calls dask_mpi.initialize(nthreads=1) so mpirun -np N pins rank 0 -> scheduler, rank 1 -> client, rest -> workers. Only rank 1 returns from initialize() and runs the rest of main(), so no rank-gating logic is needed elsewhere. Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Claude <noreply@anthropic.com>
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Adds an "mpi" option that sets up the runner to use mpi. Not sure if it actually works yet.