Communicating across parallel message-passing environments

We present a small, extensible interface for the transparent communication between vendor speci c and standard message-passing environments. With only four new commands, existing parallel applications can make use of our PLUS communication interface, thereby allowing inter-process communication with other programming environments. Much e ort has been spent in optimizing the communication speed across Internet and Intranet links. Our current implementation supports process communication between PVM, MPI, and PARIX. With only marginal additional effort, the interface can be adapted to support other message passing environments as well.