April 2017
Intermediate to advanced
532 pages
12h 39m
English
book
Machine Learning with Spark - Second Edition
by Rajdeep Dua, Brian O'Neill, Stephen Boesch, Manpreet Singh Ghotra, Nick Pentreath
Content preview from Machine Learning with Spark - Second Edition
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SparkContext and SparkConf
The starting point of writing any Spark program is SparkContext (or JavaSparkContext in Java). SparkContext is initialized with an instance of a SparkConf object, which contains various Spark cluster-configuration settings (for example, the URL of the master node).
It is a main entry point for Spark functionality. A SparkContext is a connection to a Spark cluster. It can be used to create RDDs, accumulators, and broadcast variables on the cluster.
Only one SparkContext is active per JVM. You must call stop(), which is the active SparkContext, before creating a new one.
Once initialized, we will use the various methods found in the SparkContext object to create and manipulate distributed datasets and shared variables. ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.