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Data Lake Development with Big Data

You're reading from   Data Lake Development with Big Data Explore architectural approaches to building Data Lakes that ingest, index, manage, and analyze massive amounts of data using Big Data technologies

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Product type Book
Published in Nov 2015
Publisher
ISBN-13 9781785888083
Pages 164 pages
Edition 1st Edition
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Concepts
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Toc

Data Discovery and metadata


Data Discovery deals with the identification of related data assets, making them discoverable and guiding the data consumers to relevant datasets.

The efficiency of Data Discovery depends upon the amount and quality of the metadata that is captured as the data moves across the various tiers in the Data Lake. Metadata keeps track of all the data assets that reside on a Data Lake; it helps data consumers to find the relevant data. Metadata identifies and maintains relationships between data, right from the time the data is ingested, enhanced, transformed, and evolved. It guides consumers to related datasets that can be combined and integrated.

Semantic metadata captures the semantics of the data; semantics is the ability to extract contextual meaning from text. Semantic metadata captures the context of the data and annotates the data with it; it can be used for data classification and identifying relationships between data. It improves search efficiency by providing...

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