Hot-Spot Avoidance With Multi-Pathing Over InfiniBand: An MPI Perspective

  title={Hot-Spot Avoidance With Multi-Pathing Over InfiniBand: An MPI Perspective},
  author={Abhinav Vishnu and Matthew J. Koop and Adam Moody and Amith R. Mamidala and Sundeep Narravula and Dhabaleswar K. Panda},
  journal={Seventh IEEE International Symposium on Cluster Computing and the Grid (CCGrid '07)},
Large scale InfiniBand clusters are becoming increasingly popular, as reflected by the TOP 500 supercomputer rankings. At the same time, fat tree has become a popular interconnection topology for these clusters, since it allows multiple paths to be available in between a pair of nodes. However, even with fat tree, hot-spots may occur in the network depending upon the route configuration between end nodes and communication pattern(s) in the application. To make matters worse, the deterministic… CONTINUE READING
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