January 2019
Beginner to intermediate
154 pages
4h 31m
English
Content preview from Apache Spark Quick Start Guide
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Using the Hive metastore in Spark SQL
Spark provides the flexibility to leverage the existing Hive metastore. This will allow users to access table definitions as available to Hive in Spark and to run the same HiveQL in Spark. The difference will be that queries running on Spark will be executed as per the Spark execution plan, and underlying data will be processed as per Spark execution and optimizations. These queries wont follow the MapReduce path, which is the default in Hive.
For many queries, users can see a tremendous performance gain with the Spark execution engine compared to the MapReduce engine, due to the optimized plan of execution in Spark.
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.