Message Passing Interface (MPI)
Message Passing Interface (MPI) is a standardized protocol used for parallel computing on distributed computing systems. It is a library specification for message-passing, which means that it provides a set of functions and protocols for exchanging data and messages between multiple computing nodes in a parallel computing environment.
MPI was designed to enable communication and coordination among processors in a distributed computing environment. It provides a standardized interface for different computing nodes to exchange messages, data, and synchronize their operations. This enables programmers to write parallel applications that can run on a variety of computing architectures, including clusters, supercomputers, and multi-core processors.
MPI supports various communication modes, including point-to-point communication, collective communication, and remote memory access. It also provides a range of functionalities, such as data packing and unpacking, datatype handling, and error handling. MPI has become the de facto standard for high-performance parallel computing, and many software packages and scientific applications have been developed using it.