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Open MPI:
Open Source High Performance Computing
==================================================
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A High Performance Message Passing Library
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The Open MPI Project is an open source [Message Passing Interface](http://www.mpi-forum.org/) implementation that is developed and maintained by a consortium of academic, research, and industry partners. Open MPI is therefore able to combine the expertise, technologies, and resources from all across the High Performance Computing community in order to build the best MPI library available. Open MPI offers advantages for system and software vendors, application developers and computer science researchers.
Features implemented or in short-term development for Open MPI include:
* Full MPI-4.1 standards conformance
* Thread safety and concurrency
* Dynamic process spawning
* Network and process fault tolerance
* Support network heterogeneity
* Single library supports all networks
* Run-time instrumentation
* Many job schedulers supported
* Many OS's supported (32 and 64 bit)
* Production quality software
* High performance on all platforms
* Portable and maintainable
* Tunable by installers and end-users
* Component-based design, documented APIs
* Active, responsive mailing list
* Open source license based on the BSD license
Open MPI is developed in a true open source fashion by a consortium of research, academic, and industry partners. The [Open MPI Team](about/members/) page has a comprehensive listing of all contributors and active members.
### [See the FAQ page for more technical information](faq/)
### [Join the mailing lists](community/lists/)
Open MPI v5.0.7 released
Bug fix release
Open MPI v4.1.7 released
Bug fix release.
**NOTE**: Open MPI 4.1.7 incorrectly changed the shared library versioning information for the OpenSHMEM interface, potentially causing link errors when updating from prior releases of Open MPI to 4.1.7. This release resets the shared library version number history to allow updates from Open MPI 4.1.6 and prior. Customers who updated to 4.1.7 and relinked their OpenSHMEM applications will have to relink their application again.
\> [Read more](https://www.mail-archive.com/[email protected]/msg00171.html)
Open MPI v5.0.6 released
Bug fix release
hwloc 2.12.0
Major release
\> [Read more](https://sympa.inria.fr/sympa/arc/hwloc-announce/2025-02/msg00001.html)
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Page last modified: 17-Feb-2025
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