Open MPI is a technology and resource that is merged from several other projects (Ft-mpi,la-mpi,lam/mpi and Pacx-mpi) to build the best high-performance messaging library. It implements a new open source MPI-2 standard that provides prominent systems and software vendors, http://www.aliyun.com/zixun/aggregation/13521.html "> application developers and computer science researchers." It is characterized by ease of use, and can itself run on a variety of operating systems, network interconnection and bulk/scheduling systems.
Open MPI 1.5.5 This version adds Shmem BTL mpi_thread_multiple, fixes the memory manager, fixes the MPI debug processor/memory affinity, adds a variety of checkpoint/reboot fixes, fixes the mpi_in_ on OS X Place (and other MPI constants), coupled with PMI's direct launch support, fixes a corner of the MPI data type in the packaging case, adding an important VT update to 5.12.1.4, eliminating rankfile physical mappings, upgrading embedded v1.3.2 Hwloc, Repairing AMD Opteron 6200 and 4200 systems, increased mpi_in_place support to Mpi_exscan,mellanox's MXM transport added a lot of corrections.
Software Information: http://www.open-mpi.org/
Download Address: http://www.open-mpi.org/software/ompi/v1.5/