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Data Layouts (Tables and Physical Encodings)
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Classroom Contents
Scaling Machine Learning Feature Engineering in Apache Spark at Facebook
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- 1 Intro
- 2 Machine Learning at Facebook
- 3 Data Layouts (Tables and Physical Encodings)
- 4 Background: Apache ORC
- 5 How is a Feature Map Stored in ORC?
- 6 Introducing: ORC Flattened Map
- 7 Feature Reaping
- 8 Introducing: Aligned Table
- 9 Query Plan for Aligned Table
- 10 Reading Aligned Tables
- 11 End to End Performance
- 12 Summary
- 13 Future Work
