Data Centers

InfiniBand MPI Network Design and Simulation Using IBSim

Download Now Date Added: Dec 2009
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By using Microway's InfiniScope real-time InfiniBand monitoring tool to monitor HPC (High Performance Computing) clusters performing real world computations, the authors have observed that in many HPC applications, the amount of time spent carrying out computations is much greater than the time spent exchanging data between nodes. InfiniBand switch manufacturers would like customers to believe that they require enough switches to guarantee the availability of full bisectional bandwidth, but when InfiniBand fabrics are used to support fine grained parallel computation they seldom produce enough traffic to saturate such a fabric. To quantify how network topology, fabric size, and algorithmic parameters affect the efficiency of large clusters, Microway has created an HPC simulator called IBSim.