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NEWS: OMPIO is now the default everywhere

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Huzzah!

Signed-off-by: Jeff Squyres <jeff@squyres.com>
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Jeff Squyres 2020-12-17 20:10:07 -05:00
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@ -64,6 +64,10 @@ included in the vX.Y.Z section and be denoted as:
Both components are off by default and can be enabled by specifying
"mpirun --mca coll_adapt_priority 100 --mca coll_han_priority 100 ...".
We intend to enable both by default in Open MPI 5.0.
- OMPIO is now the default for MPI-IO on all filesystems, including
Lustre (prior to this, ROMIO was the default for Lustre). Many
thanks to Mark Dixon for identifying MPI I/O issues and providing
access to Lustre systems for testing.
- Updates for macOS Big Sur. Thanks to FX Coudert for reporting this
issue and pointing to a solution.
- Minor MPI one-sided RDMA performance improvements.