January 2018
Beginner to intermediate
412 pages
9h 33m
English
Content preview from Practical Big Data Analytics
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SparkContext
A SparkContext is the entry point for all Spark operations and means by which the application connects to the resources of the Spark cluster. It initializes an instance of Spark and can thereafter be used to create RDDs, perform actions and transformations on the RDDs, and extract data and other Spark functionalities. A SparkContext also initializes various properties of the process, such as the application name, number of cores, memory usage parameters, and other characteristics. Collectively, these properties are contained in the object SparkConf, which is passed to SparkContext as a parameter.
SparkSession is the new abstraction through which users initiate their connection to Spark. It is a superset of the functionality provided ...
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