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Overview:

Working with historic household Census data can be quite challenging. Semi-annual data sets can exceed 50 gigabytes and when working with multi-year data it is often necessary to extract information from yearly clusters of data sets exceeding 300 gigabytes. These yearly clusters, until recently, have been processed sequencally, each independent process relying on the completion of the previous process before continuing. The sorting alone of some of these data sets can take over an hour of clock time. Processing six data set representing three years of data can take six hours. By using format tables and eliminating sorts and merges, reducing repeated passes through the data, and the use of MP connect for independent processes processing time and temporary storage can be reduced by over 50 percent.

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Format:PDFSize:266 KB
Date:Feb 2009
Pages:6

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