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relax version 1.3.12.

Item posted by Edward d Auvergne <bugman> on Wed Aug 24 09:01:44 2011.


This is a major feature release which adds the ability to run relax on clusters or grids of computers via the MPI protocol. This merges in Gary Thompson's multi-processor branch which was started all the way back in 2007. The 'multi' package introduces two processor fabrics, the standard uni-processor mode and the mpi4py mode for using the MPI protocol with Python. The model-free analysis code has been parallelised to take advantage of the multi-processor modes, significantly speeding up calculations on clusters with near perfect scaling efficiency. The flexible 'multi' package can easily be extended for other multi-processor modes such as additional MPI implementations using different Python libraries (pypar, etc.), the use of ssh tunnels for parallel programming, use of the twisted framework for communication, or the parallel virtual machine (PVM) via pypvm. For more information on how to use this, see


The new relax versions can be downloaded from either or If binary distributions are not yet available for your platform and you manage to compile the binary modules, please consider contributing these to the relax project (described in section 3.6 of the relax manual).

Full list of changes


  • The multi-processor capabilities of Gary Thompson's multi package including both uniprocessor and mpi4py modes.






Wiki release announcement. (posted by Edward d Auvergne, Sat Sep 20 18:39:53 2014)


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