open-mpi/ompi
FreeOpen MPI main development repository
FreeFree tier
About open-mpi/ompi
Open MPI is an open source implementation of the Message Passing Interface (MPI) specification, developed and maintained by a consortium of academic, research, and industry partners. It combines expertise, technologies, and resources from across the High Performance Computing (HPC) community to build a high-quality MPI library. Open MPI supports C and Fortran and is suitable for system vendors, application developers, and computer science researchers. Documentation is available online at https://docs.open-mpi.org/ and in official distribution tarballs.
Key Features
Implements the Message Passing Interface (MPI) specification
Developed and maintained by a consortium of academic, research, and industry partners
Combines expertise from across the high performance computing community
Supports C and Fortran programming languages
Comprehensive documentation available online and in distribution tarballs
Suitable for system vendors, application developers, and researchers
Pros & Cons
Pros
- Open source and free to use
- Backed by a consortium ensuring broad expertise and long-term support
- Well-documented with online resources and local build options
- Combines best-of-breed technologies from the HPC community
- Active community with over 2,600 GitHub stars and 900+ forks
Cons
- Requires knowledge of MPI and parallel programming concepts to use effectively
- Primarily a library, not a standalone application for end users
Best For
Parallel computing on clusters and supercomputersHigh-performance computing applications requiring message passingScientific computing and simulation workloadsHPC research and development projects
FAQ
What is Open MPI?
Open MPI is an open source implementation of the Message Passing Interface (MPI) specification, developed by a consortium of academic, research, and industry partners.
Where can I find the documentation?
Documentation is available online at https://docs.open-mpi.org/ or in official distribution tarballs under docs/_build/html/index.html.
Is Open MPI free to use?
Yes, Open MPI is open source and free to use. The repository includes a license file for terms.