An Overview of Computing at Los Alamos

  • Robert H. Ewald


The Los Alamos National Laboratory operates one of the largest scientific and engineering computing facilities in the world to support its national defence and other programs. This facility, as of the summer of 1984, had six Cray-computers, five CDC-7600-class machines, and many other smaller computers in an “Integrated Computing Network” (ICN). This network also provides central and distributed nodes for file management and storage, graphical and printed output, network and production control, and distributed computing.

The characteristics of some of the major applications in the ICN and the performance of the various Cray computers on the Los Alamos workload are discussed, and some experiences in creating the ICN and plans for the future are presented.


Alamos National Laboratory Digital Equipment Corporation Communication Division Disk Controller Timesharing System 
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    W. Alexander, “1984 Workload and Performance Measurement on the Cray/CTSS Systems at Los Alamos”, Los Alamos National Laboratory, unclassified report LA-UR-84–1610 (June 1984).Google Scholar
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    I.Y. Bucher and J.L. Martin, “Methodology for Characterizing a Scientific Workload”, Los Alamos National Laboratory, unclassified report LA-UR-82–1771 (October 1982).Google Scholar
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    J.L. Martin, I.Y. Bucher,and T.T. Warnock, “Workload Characterization for Vector Computers: Tools and Techniques”, Los Alamos National Laboratory, unclassified report LA-UR-83–305 (August 1983).Google Scholar

Copyright information

© Plenum Press, New York 1985

Authors and Affiliations

  • Robert H. Ewald
    • 1
  1. 1.Computing and Communications DivisionLos Alamos National LaboratoryLos AlamosUSA

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