Construction of the mesh and the torus tolerating a large number of faults

  • Authors:
  • Hisao Tamaki

  • Affiliations:
  • IBM T.J. Watson Research Center, P. O. Box 218 Yorktown Heights, NY

  • Venue:
  • SPAA '94 Proceedings of the sixth annual ACM symposium on Parallel algorithms and architectures
  • Year:
  • 1994

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Abstract

Suppose each node and each edge of a network is independently faulty with probability at most p and q respectively, where 0 p, q d ≥ 2, we construct a network with O(N) nodes and with degree O(log log N) such that, after removing all the faulty nodes and edges, it still contains the N-node d-dimensional N1/d × … × N1/d torus, and hence the mesh of the same size, with probability 1–N–&OHgr;(loglog N). This is derived as a consequence of a simple constant-degree construction which tolerates random faults where the failure probability of each node is O(log–3d). We also give a simple constant-degree construction with O(N) nodes that tolerates O(N(1–2-d)/d worst case faults.