Merit and drawback of mpi, Computer Networking

Merits of MPI

Runs on any shared or distributed memory architectures;
Can be used on a wider range of troubles than OpenMP;
Every process has its own local variables; and
Distributed memory computers are not costly rather than large shared memory computers.

Drawback of MPI

Needs more programming changes to go from serial to parallel version.
Can be harder to debug, and
Performance is partial by the communication network among the nodes.

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