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Jobs that run on multiple nodes generally use a parallel programming API called MPI (Message Passing Interface), which allows processes on multiple nodes to communicate with high throughput and low latency (especially over Talapas' InfiniBand network). MPI is a standard and has multiple implementations—several are available on Talapas, notably Open MPI and Intel MPI. The choice between these is largely a matter of personal taste and the specific needs of the situation.
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