2.5. Background of MPI-2.2
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MPI-2.2 is a minor update to the MPI-2.1 standard. This version
addresses additional errors and ambiguities that were not corrected in
the MPI-2.1 standard as well as a small number of extensions to
MPI-2.1 that met the following criteria:
- Any correct MPI-2.1 program is a correct MPI-2.2 program.
- Any extension must have significant benefit for users.
- Any extension must not require significant implementation
effort. To that end, all such changes are accompanied by an open
source implementation.
The discussions of MPI-2.2 proceeded concurrently with the MPI-3
discussions; in some cases, extensions were proposed for MPI-2.2 but
were later moved to MPI-3.
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