Refs #4606 mpi script that runs on lens interactively but not in jobs

Code/Mantid/Framework/MPIAlgorithms/scripts/CNCS_mpi_example.py

@@ -0,0 +1,41 @@
+#############################################################################################
+#
+# Example script to demonstrate the use of MPI in Mantid.
+# This requires the boost.mpi python bindings, which can be obtained from
+# http://mathema.tician.de/software/boostmpi and obviously an MPI-enabled Mantid build.
+#
+#############################################################################################
+
+from MantidFramework import * 
+from mpi4py import MPI
+mtd.initialise()
+
+comm = MPI.COMM_WORLD
+rank = comm.Get_rank()
+size = comm.size
+
+print "Running on rank %d of %d" % (rank, size)
+
+eventfile="/ccs/home/8oz/Code/Mantid/Test/AutoTestData/CNCS_7860_event.nxs"
+wksp="partial"
+binning="40e3, 100, 70e3"
+
+Load(Filename=eventfile, OutputWorkspace=wksp)
+
+# Find which chunk to process
+w = mtd[wksp]
+chunk = w.getNumberHistograms() / size
+startWI = rank*chunk
+endWI = startWI + chunk - 1
+
+# Do some processing (something silly for now)
+SumSpectra(InputWorkspace=wksp, OutputWorkspace=wksp, StartWorkspaceIndex="%d"%startWI, EndWorkspaceIndex="%d"%endWI)
+Rebin(InputWorkspace=wksp, OutputWorkspace=wksp, Params=binning)
+
+
+# BroadcastWorkspace(InputWorkspace=van,OutputWorkspace="Vanadium",BroadcasterRank=len(runs))
+GatherWorkspaces(InputWorkspace=wksp, OutputWorkspace="total")
+
+if rank == 0:
+    SaveNexus(InputWorkspace="total",Filename="mpi.nxs")
+

Code/Mantid/Framework/MPIAlgorithms/scripts/cncs_script.pbs

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+#PBS -A CSC035
+#PBS -N Mantid_CNCS_mpi_example
+#PBS -j oe
+#PBS -l walltime=00:10:00
+#PBS -l nodes=2:ppn=16
+# Email when it ends #PBS -m e
+
+module load hdf5
+module load ompi/1.4.3-gnu4.4.4
+module load gcc/4.4.4
+
+# Setup environment to point to home directory
+export PATH=$HOME/bin:$PATH
+export LD_LIBRARY_PATH=$HOME/lib:$LD_LIBRARY_PATH
+export PYTHONPATH=$HOME/lib/python2.7/site-packages/
+
+echo $LD_LIBRARY_PATH
+
+cd /ccs/home/8oz/Code/Mantid/Code/Mantid/Framework/MPIAlgorithms/scripts
+export MANTIDPATH=$HOME/Code/Mantid/framework/bin 
+export PYTHONPATH=$MANTIDPATH 
+mpirun ~/bin/python2.7 CNCS_mpi_example.py