Computer Science > Mathematical Software
[Submitted on 2 Sep 2020]
Title:A Survey of Singular Value Decomposition Methods for Distributed Tall/Skinny Data
View PDFAbstract:The Singular Value Decomposition (SVD) is one of the most important matrix factorizations, enjoying a wide variety of applications across numerous application domains. In statistics and data analysis, the common applications of SVD such as Principal Components Analysis (PCA) and linear regression. Usually these applications arise on data that has far more rows than columns, so-called "tall/skinny" matrices. In the big data analytics context, this may take the form of hundreds of millions to billions of rows with only a few hundred columns. There is a need, therefore, for fast, accurate, and scalable tall/skinny SVD implementations which can fully utilize modern computing resources. To that end, we present a survey of three different algorithms for computing the SVD for these kinds of tall/skinny data layouts using MPI for communication. We contextualize these with common big data analytics techniques, principally PCA. Finally, we present both CPU and GPU timing results from the Summit supercomputer, and discuss possible alternative approaches.
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