The Information Sciences Institute and Caltech are enabling US Joint Forces COMmand (USJFCOM) and the Institute for Defense Analyses to conduct entity-level simulation experiments using hundreds of distributed computer nodes on Linux Clusters as a vehicle for simulating millions of Joint SemiAutomated Forces (JSAF) entities. Included in this paper is the experience with the design and implementation of the code that increased scalability, thereby enabling two orders of magnitude growth and the effective use of Department of Defense (DoD) high-end computers. A typical JSAF experiment generates several terabytes of logged data, which is queried in near-real-time and for months afterward.
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