Cost-Efficient Dragonfly Topology for Large-Scale Systems

  • Authors:
  • John Kim;William Dally;Steve Scott;Dennis Abts

  • Affiliations:
  • Northwestern University;Stanford University;Cray;Google

  • Venue:
  • IEEE Micro
  • Year:
  • 2009

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Abstract

It is more efficient to use increasing pin bandwidth by creating high-radix routers with a large number of narrow ports instead of low-radix routers with fewer wide ports. Building networks using high-radix routers lowers cost and improves performance, but also presents many challenges. The dragonfly topology minimizes network cost by reducing the number of global channels required.