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• W2293771254 abstract "In the age of statistical and scientific databases, there is an emerging trend of integrating analytical algorithms into database systems. Many of these algorithms are based on linear algebra with large, sparse matrices. However, linear algebra expressions often contain multiplications of more then two matrices. The execution of sparse matrix chains is nontrivial, since the runtime depends on the parenthesization and on physical properties of intermediate results. Our approach targets to overcome the burden for data scientists of selecting appropriate algorithms, matrix storage representations, and execution paths. In this paper, we present a sparse matrix chain optimizer (SpMachO) that creates an execution plan, which is composed of multiplication operators and transformations between sparse and dense matrix storage representations. We introduce a comprehensive cost model for sparse-, dense- and hybrid multiplication kernels. Moreover, we propose a sparse matrix product density estimator (SpProdest) for intermediate result matrices. We evaluated SpMachO and SpProdest using real-world matrices and random matrix chains." @default.
• W2293771254 created "2016-06-24" @default.
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• W2293771254 creator A5013741646 @default.
• W2293771254 creator A5063512642 @default.
• W2293771254 date "2015-01-01" @default.
• W2293771254 modified "2023-09-23" @default.
• W2293771254 title "SpMachO - Optimizing Sparse Linear Algebra Expressions with Probabilistic Density Estimation" @default.
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