Updated recipe 5.11.

Author: rossant

notebooks/chapter05_hpc/11_mpi.ipynb

@@ -1,7 +1,7 @@
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@@ -28,15 +28,7 @@
      "cell_type": "markdown",
      "metadata": {},
      "source": [
-      "To use MPI with IPython you need:\n",
-      "\n",
-      "* A standard MPI implementation such as [OpenMPI](http://www.open-mpi.org) or [MPICH](http://www.mpich.org).\n",
-      "* The [mpi4py package](http://mpi4py.scipy.org).\n",
-      "\n",
-      "For example, here are the commands to install MPI for IPython on Ubuntu:\n",
-      "\n",
-      "    > sudo apt-get install libcr-dev mpich2 mpich2-doc\n",
-      "    > sudo apt-get install python-mpi4py"
+      "For this recipe, you need a MPI installation and the mpi4py package."
      ]
     },
     {
@@ -67,7 +59,7 @@
      "cell_type": "markdown",
      "metadata": {},
      "source": [
-      "3. Once the MPI profile has been created and configured, we can launch the engines in the IPython dashboard, by selecting the number of engines (e.g. one per processor) in the *Clusters* tab, *MPI* profile, and pressing *Start*. Alternatively, we can run in a terminal: `ipcluster start -n 2 --engines MPI --profile=mpi`."
+      "3. Once the MPI profile has been created and configured, we can launch the engines with: `ipcluster start -n 4 --engines MPI --profile=mpi` in a terminal."
      ]
     },
     {
@@ -146,7 +138,7 @@
       "%%px\n",
       "from mpi4py import MPI\n",
       "import numpy as np\n",
-      "print MPI.COMM_WORLD.allreduce(np.sum(a), op=MPI.SUM)"
+      "print(MPI.COMM_WORLD.allreduce(np.sum(a), op=MPI.SUM))"
      ],
      "language": "python",
      "metadata": {},