An out-of-core sparse symmetric-indefinite factorization method

  • Authors:
  • Omer Meshar;Dror Irony;Sivan Toledo

  • Affiliations:
  • Tel-Aviv University, Tel-Aviv, Israel;Tel-Aviv University, Tel-Aviv, Israel;Tel-Aviv University, Tel-Aviv, Israel

  • Venue:
  • ACM Transactions on Mathematical Software (TOMS)
  • Year:
  • 2006

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Abstract

We present a new out-of-core sparse symmetric-indefinite factorization algorithm. The most significant innovation of the new algorithm is a dynamic partitioning method for the sparse factor. This partitioning method results in very low I/O traffic and allows the algorithm to run at high computational rates, even though the factor is stored on a slow disk. Our implementation of the new code compares well with both high-performance in-core sparse symmetric-indefinite codes and a high-performance out-of-core sparse Cholesky code.