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From the Open MPI Team -- go team

The Open MPI Team, representing a consortium of research, academic, and industry partners, is pleased to announce the release of Open MPI version 3.0.0.

v3.0.0 is the start of a new release series for Open MPI. Open MPI 3.0.0 enables MPI_THREAD_MULTIPLE by default, so a build option to Open MPI is no longer required to enable thread support. Additionally, the embedded PMIx runtime has been updated to 2.1.0 and the embedded hwloc has been updated to 1.11.7. There have been numerous other bug fix and performance improvements. Version 3.0.0 can be downloaded from the main Open MPI web site.

NEWS:

Major new features:

Changes in behavior compared to prior versions:

Removed legacy support:

Known issues: