User Migration Guide: 1.8.x and v1.10.x to v2.0.0
Jeff Squyres edited this page May 3, 2016
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10 revisions
Users should not treat this wiki page as definitive (YET). Please check back later.
(this content will likely end up being on the main Open MPI web site -- not on this wiki -- and linked to from https://www.open-mpi.org/software/ompi/v2.x/)
I.e., things that may prevent users from simply re-compiling / re-mpirun'ing their existing MPI app.
- mpirun -np behavior
- OMPIO is now the default (not ROMIO): but ROMIO is still the default for Lustre
- MPI C++ bindings are disabled by default
- Not ABI compatible with v1.8/v1.10 / describe the new version number scheme
- ...more?
- Launch scalability improvements (i.e., support for PMIx)
- Lots of improvements to MPI RMA
- Improved support for MPI_THREAD_MULTIPLE (when configured with
--enable-mpi-thread-multiple) - ompi_info pretty print improvements
- UCX support
- PLFS support (via OMPIO)
- Better Cray build / SLURM support
- Better infrastructure for patch support
- ...more?
- OS X Leopard
- Cray XT
- VampirTrace
- Myrinet MX / Open-MX
- coll:ml module
- Alpha processors
- --enable-mpi-profiling option
- Checkpoint / restart
- ...more?