An Out-of-Core Eigensolver on SSD-equipped Clusters

  • Authors:
  • Zheng Zhou;Erik Saule;Hasan Metin Aktulga;Chao Yang;Esmond G. Ng;Pieter Maris;James P. Vary;Umit V. Catalyurek

  • Affiliations:
  • -;-;-;-;-;-;-;-

  • Venue:
  • CLUSTER '12 Proceedings of the 2012 IEEE International Conference on Cluster Computing
  • Year:
  • 2012

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Abstract

Obtaining highly accurate predictions on properties of light atomic nuclei using the Configuration Interaction (CI)approach requires computing few extremal eigenpairs of a large many-body nuclear Hamiltonian matrix, H. A forefront challenge in CI calculations is the massive size of H and its eigenvectors. The emergence of clusters equipped with non-volatile NAND-flash memory based solid state drives (SSD) presents unique opportunities. In this paper, we present the implementation details of an out-of-core eigensolver using a novel distributed out-of-core linear algebra framework, called DOoC+LAF. The framework provides an easy-to-use high-level application interface for linear algebra operations while providing efficient execution by orchestrating pipelined execution of computation, communication and I/O. We demonstrate the effectiveness of our out-of-core eigensolver implemented using DOoC+LAF by reporting performance results on large-scale eigenvalue problems arising in nuclear structure calculations.