message passing interface (MPI)

The Message Passing Interface (MPI) is a standardized program library for the message-driven cooperation of parallel processes.

The MPI interface is used, for example, in supercomputers and in high-performancecomputers( HPC), in which the performance of hundreds of nodes working in parallel is bundled together. To ensure that the computers do not obstruct each other when accessing the shared work files, the MPI interface has a special access mechanism with which the I/O accesses are controlled in parallel. MPI interfaces ensure that the files from the storage devices reach the computing units and back via parallel data paths as quickly as possible. The essential aspect is parallelism, since only through such parallelism the enormous data rates can be realized.