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Scientific Programming
Volume 3 (1994), Issue 1, Pages 49-60

HeNCE: A Heterogeneous Network Computing Environment

Adam Beguelin,1 Jack J. Dongarra,2 George Al Geist,3 Robert Manchek,4 and Keith Moore4

1School of Computer Science and Pittsburgh Supercomputing Center, Carnegie Mellon University, Pittsburgh, PA 15213, USA
2University of Tennessee and Oak Ridge National Laboratory, Knoxville, TN, USA
3Oak Ridge National Laboratory, Knoxville, TN 37831, USA
4University of Tennessee, Knoxville, TN 37996, USA

Received 30 December 1992; Accepted 30 November 1993

Copyright © 1994 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Network computing seeks to utilize the aggregate resources of many networked computers to solve a single problem. In so doing it is often possible to obtain supercomputer performance from an inexpensive local area network. The drawback is that network computing is complicated and error prone when done by hand, especially if the computers have different operating systems and data formats and are thus heterogeneous. The heterogeneous network computing environment (HeNCE) is an integrated graphical environment for creating and running parallel programs over a heterogeneous collection of computers. It is built on a lower level package called parallel virtual machine (PVM). The HeNCE philosophy of parallel programming is to have the programmer graphically specify the parallelism of a computation and to automate, as much as possible, the tasks of writing, compiling, executing, debugging, and tracing the network computation. Key to HeNCE is a graphical language based on directed graphs that describe the parallelism and data dependencies of an application. Nodes in the graphs represent conventional Fortran or C subroutines and the arcs represent data and control flow. This article describes the present state of HeNCE, its capabilities, limitations, and areas of future research.