ScaLAPACK for Python (scalapy)
scalapy is a wrapping of Scalapack such that it can be called by Python in
a friendly manner.
Operations are performed on
DistributedMatrix objects which can be easily
created whilst hiding all the nasty details of block cyclic distribution.
scalapy supports both Python 2 and 3 (2.7, 3.2 or later).
The package depends upon two python packages
mpi4py. It is
written largely in pure Python, but some parts require
It also requires an
MPI distribution (OpenMPI and IntelMPI supported out the
box), and a
Scalapack installation (both Intel MKL and NETLIB are currently
To build just use the standard
$ python setup.py install
It will attempt to probe you current environment to determine which MPI
distribution, and ScaLAPACK installation to use. As this isn't completely
robust, you can edit
setup.py manually specify what to use.
Limited, but improving, documentation is available here.
MPI Version (OpenMPI 1.8.2 or higher)
Some of the features, especially distribution of matrices from global arrays and
files, make heavy use of advanced features of MPI, such as derived datatypes and
MPI-IO. Unfortunately many MPI distributions contain critical bugs in these
components (mostly due to
ROMIO), which means these will fail in some common
However, recent versions of OpenMPI contain a new implementation of MPI-IO (called OMPIO) which seems to be issue free. This means that for full, and successful usage you should try and use OpenMPI 1.8.2 or greater. Additionally, you may need to force it to use OMPIO rather than ROMIO. This can be done by calling with:
$ mpirun -mca io ompio ...
or by setting the environment variable:
$ export OMPI_MCA_io=ompio