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The refactoring of the Task system is nearly complete. Now there are...
The refactoring of the Task system is nearly complete. Now there are multiple types of tasks including `StringTask` and `MapTask`. Each task type is responsible for running itself and processing its own result. This makes it much easier for people to create new task types. Also, the map and parallel function support has been completely refactored and improved. This includes a map and parallel function implementation for the task controller as well as a @parallel decorator.
Brian E Granger - - Load All Authors

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parallel_mpi.txt
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.. _parallelmpi:
=======================
Using MPI with IPython
=======================
The simplest way of getting started with MPI is to install an MPI implementation
(we recommend `Open MPI`_) and `mpi4py`_ and then start the engines using the
``mpirun`` command::
mpirun -n 4 ipengine --mpi=mpi4py
This will automatically import `mpi4py`_ and make sure that `MPI_Init` is called
at the right time. We also have built in support for `PyTrilinos`_, which can be
used (assuming `PyTrilinos`_ is installed) by starting the engines with::
mpirun -n 4 ipengine --mpi=pytrilinos
.. _MPI: http://www-unix.mcs.anl.gov/mpi/
.. _mpi4py: http://mpi4py.scipy.org/
.. _Open MPI: http://www.open-mpi.org/
.. _PyTrilinos: http://trilinos.sandia.gov/packages/pytrilinos/