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The Resiliency of Multilevel Methods on Next-Generation Computing Platforms: Probabilistic Model and Its Analysis

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Part of the Advances in Mechanics and Mathematics book series (AMMA, volume 41)

Abstract

The reduced reliability of next-generation exascale systems means that the resiliency properties of a numerical algorithm will become an important factor both in the choice of algorithm and in its analysis. The multigrid algorithm is the workhorse for the distributed solution of linear systems but little is known about its resiliency properties and convergence behavior in a fault-prone environment. In the current work, we propose a probabilistic model for the effect of faults involving random diagonal matrices. We summarize results of the theoretical analysis of the model for the rate of convergence of fault-prone multigrid methods which show that the standard multigrid method will not be resilient. Finally, we present a modification of the standard multigrid algorithm that will be resilient.

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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Division of Applied MathematicsBrown UniversityProvidenceUSA
  2. 2.Center for Computing ResearchSandia National LaboratoriesAlbuquerqueUSA

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