How to quantify performance and scalability benefits of parallel I/O.
This work examines the parallel scalability characteristics of commercial CFD software ANSYS FLUENT 12 for up to 256 processing cores, for transient CFD simulations that are heavy in I/O relative to numerical operations. In studies conducted with engineering contributions from the University of Cambridge and ANSYS, the Linux HPC environment named Darwin combined an Intel Xeon cluster with a Panasas parallel file system and shared storage. The motivation for these studies was to quantify the performance and scalability benefits of parallel I/O in CFD software on a parallel file system, verses a conventional serial NFS file systems for transient CFD cases.
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