Computing rank‐revealing factorizations of matrices stored out‐of‐core
Computing rank‐revealing factorizations of matrices stored out‐of‐core
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计算排名——揭示存储在核心之外的矩阵的因式分解
DOI:
10.1002/cpe.7726
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Quintana‐Ortí, G.
中科院分区:
文献类型:
--
作者:
Heavner, N.;Martinsson, P. G.;Quintana‐Ortí, G.
This paper describes efficient algorithms for computing rank‐revealing factorizations of matrices that are too large to fit in main memory (RAM), and must instead be stored on slow external memory devices such as disks (out‐of‐core or out‐of‐memory). Traditional algorithms for computing rank‐revealing factorizations (such as the column pivoted QR factorization and the singular value decomposition) are very communication intensive as they require many vector‐vector and matrix‐vector operations, which become prohibitively expensive when data is not in RAM. Randomization allows to reformulate new methods so that large contiguous blocks of the matrix are processed in bulk. The paper describes two distinct methods. The first is a blocked version of column pivoted Householder QR, organized as a “left‐looking” method to minimize the number of the expensive write operations. The second method results employs a UTV factorization. It is organized as an algorithm‐by‐blocks to overlap computations and I/O operations. As it incorporates power iterations, it is much better at revealing the numerical rank. Numerical experiments on several computers demonstrate that the new algorithms are almost as fast when processing data stored on slow memory devices as traditional algorithms are for data stored in RAM.
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DOI:
--
发表时间:
2019
期刊:
arXiv.org
影响因子:
--
作者:
V. Demchik;M. Bacák;Stefan Bordag
通讯作者:
Stefan Bordag
DOI:
--
发表时间:
2001
期刊:
Proceedings, International Parallel and Distributed Processing Symposium (IPDPS)
影响因子:
--
作者:
B. Gunter;Wesley C. Reiley;R. V. D. Geijn
通讯作者:
R. V. D. Geijn
DOI:
--
发表时间:
2012
期刊:
J. Parallel Distributed Comput.
影响因子:
--
作者:
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通讯作者:
F. V. Zee
影响因子:
14.2
作者:
Martinsson, Per-Gunnar;Tropp, Joel A.
通讯作者:
Tropp, Joel A.
DOI:
10.7717/peerj-cs.338/table-7
发表时间:
2014
期刊:
The World Wide Web Conference
影响因子:
--
作者:
Henrique de Oliveira Gressler;M. C. Cera
通讯作者:
M. C. Cera