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MultiNest Installation Notes

 

macOS 10.12

The following notes (by J. R. Lu) may help with installing MultiNest using MPI for enabling parallel processing. This installation was performed on a Mac with macOS 10.12 (64-bit architecture) on a early-2015 MacBook Pro laptop.

Dependencies: MacPorts, Anaconda, AstroConda

Install dependencies and packages through MacPorts:

sudo port install gcc49
sudo port install cmake
sudo port install openmpi

# Select the compilers
sudo port select --set gcc mp-gcc49
sudo port select --set mpi openmpi-mp-fortran

 

Install mpi4py. Note that you shouldn't install mpi4py from conda as it installs its own openmpi. This version did not work for me. Instead, using the "pip install" approach uses the MacPorts install of openmpi.

pip install mpi4py

 

Download Multinest from Johannes Buchner's git repository.

git clone https://github.com/JohannesBuchner/MultiNest.git
cd MultiNest/build/
cmake ..
make
sudo make install

 

Downloaded latest PyMultiNest. You may or may not need sudo when you run the last install step. Make sure you have activated the desired conda environment.

 

git clone https://github.com/JohannesBuchner/PyMultiNest.git 
cd PyMultiNest 
python setup.py install

 

 

Test that the installation works. First, in the MultiNest install directory, you can run the examples from bin/.

rm chains/*
./eggboxC

To test MPI operations, start

top -o cpu

in a separate terminal window and monitor whether the following commands initiate many threads.

rm chains/*
mpirun -np 6 eggboxC

To test pymultinest, go into the PyMultiNest install directory. You can run the demo.

python pymultinest_demo_minimal.py

To test pymultinest in MPI mode, you need to modify pymultinest_demo_minimal.py to set init_MPI=False in the run() command. I don't know why this fails yet (haven't explored).

rm chains/*
mpirun -np 6 python pymultinest_demo_minimal.py

 

 

OS X v10.9

The following notes (by J. R. Lu) may help with installing MultiNest using MPI for enabling parallel processing. This installation was performed on a Mac with OS X 10.9 (64-bit architecture) on a mid-2014 Mac Pro.

Dependencies: Ureka

Downloaded Open MPI 1.8.4-rc1 from here. Installed with the following:

 ./configure
make all
sudo make install

Downloaded CMake 3.1.0-rc3 from here (with OS X *.dmg). Installed as app and added the following symbolic links to /usr/local/bin/

sudo ln -s *abspath*/CMake.app/Contents/bin/ccmake
sudo ln -s *abspath*/CMake.app/Contents/bin/cmake
sudo ln -s *abspath*/CMake.app/Contents/bin/cmake-gui
sudo ln -s *abspath*/CMake.app/Contents/bin/cmakeexbuild
sudo ln -s *abspath*/CMake.app/Contents/bin/cpack
sudo ln -s *abspath*/CMake.app/Contents/bin/ctest

Install mpi4py -- pymultinest dependency

sudo pip install mpi4py

Download Multinest from Johannes Buchner's git repository.

git clone https://github.com/JohannesBuchner/MultiNest.git
cd MultiNest/build/
cmake ..
make

Copy the libraries into /usr/local/lib. Also make symbolic links for a *.so file since this what pymultinest will depend on. Execute in Multinest/lib/.

sudo cp libmultinest.3.8.dylib /usr/local/lib/
sudo cp libmultinest_mpi.3.8.dylib /usr/local/lib/
sudo cp libmultinest.a /usr/local/lib/
sudo cp libmultinest_mpi.a /usr/local/lib/

sudo ln -s /usr/local/lib/libmultinest.3.8.dylib /usr/local/lib/libmultinest.dylib
sudo ln -s /usr/local/lib/libmultinest.dylib /usr/local/lib/libmultinest.so
sudo ln -s /usr/local/lib/libmultinest_mpi.3.8.dylib /usr/local/lib/libmultinest_mpi.dylib
sudo ln -s /usr/local/lib/libmultinest_mpi.dylib /usr/local/lib/libmultinest_mpi.so

Downloaded latest PyMultiNest. You may or may not need sudo when you run the last install step.

git clone https://github.com/JohannesBuchner/PyMultiNest.git
cd PyMultiNest
python setup.py install

Test that the installation works. First, in the MultiNest install directory, you can run the examples from bin/.

rm chains/*
eggboxC

To test MPI operations, start

top -o cpu

in a separate terminal window and monitor whether the following commands initiate many threads.

rm chains/*
mpirun -np 6 eggboxC

To test pymultinest, go into the PyMultiNest install directory. You can run the demo.

python pymultinest_demo_minimal.py

To test pymultinest in MPI mode, you need to modify pymultinest_demo_minimal.py to set init_MPI=False in the run() command. I don't know why this fails yet (haven't explored).

rm chains/*
mpirun -np 6 python pymultinest_demo_minimal.py
Page last modified on Tuesday 11 of October, 2016 18:36:10 EDT