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NERSC 3 Greenbook

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Software

The computing axiom ``Nothing happens in a computer without good software'' is still true today and even more so with the advent of MPP technology. The software infrastructure is what a user truly interacts with and is now becoming a measure that distinguishes MPP vendor offerings. The infrastructure includes distributed computing tools, operating systems, network software, compilers debuggers, performance tools, standards based libraries (e.g., BLAS, LAPACK, etc.), job control and queuing systems, as well as third party applications that are of great importance to many end users in the ER community. Below we discuss aspects of the software infrastructure that are required by the ER scientific computing user community.