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Apache Spark 2.x for Java Developers

You're reading from Apache Spark 2.x for Java Developers Explore big data at scale using Apache Spark 2.x Java APIs

Product type Paperback

Published in Jul 2017

Publisher Packt

ISBN-13 9781787126497

Length 350 pages

Edition 1st Edition

Languages

Java

Tools

Apache Spark

Concepts

Big Data

Authors (2):

Sourav Gulati

Sumit Kumar

View More author details

Table of Contents (12) Chapters

Preface

1. Introduction to Spark FREE CHAPTER

2. Revisiting Java

3. Let Us Spark

4. Understanding the Spark Programming Model

5. Working with Data and Storage

6. Spark on Cluster

7. Spark Programming Model - Advanced

8. Working with Spark SQL

9. Near Real-Time Processing with Spark Streaming

10. Machine Learning Analytics with Spark MLlib

11. Learning Spark GraphX

Dataframe and dataset

Dataframes were introduced in Spark 1.3. Dataframe built on the concept of providing schemas over the data. An RDD basically consists of raw data. Although it provides various functions to process the data, it is a collection of Java objects and is involved in the overhead of garbage collection and serialization. Also, Spark SQL concepts can only be leveraged if it contains some schema. So, earlier version of a Spark provide another version of RDD called SchemaRDD.

SchemaRDD

As its name suggests, it is an RDD with schema. As it contains schema, run relation queries can be run on the data along with basic RDD functions. The SchemaRDD can be registered as a table so that SQL queries can be executed on it using Spark SQL. It was available in earlier version of a Spark. However, with Spark Version 1.3, the SchemaRDD was deprecated and dataframe was introduced.

Dataframe

In spite of being an evolved version of SchemaRDD, dataframe comes with big differences to RDDs. It was introduced...

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Authors (2)

Gulati

Gulati

Shekhar Gulati is a developer and OpenShift evangelist working with Red Hat. He has been evangelizing about OpenShift for the last 2 years. He regularly speaks at various conferences and user groups around the world to spread the goodness of OpenShift. He regularly blogs on the OpenShift official blog and has written more than 50 blogs on OpenShift. Shekhar has also written many technical articles for IBM developerWorks, Developer.com, and Javalobby.

See other products by Gulati

Kumar

Kumar

Ashish Kumar is a seasoned data science professional, a publisher author and a thought leader in the field of data science and machine learning. An IIT Madras graduate and a Young India Fellow, he has around 7 years of experience in implementing and deploying data science and machine learning solutions for challenging industry problems in both hands-on and leadership roles. Natural Language Procession, IoT Analytics, R Shiny product development, Ensemble ML methods etc. are his core areas of expertise. He is fluent in Python and R and teaches a popular ML course at Simplilearn. When not crunching data, Ashish sneaks off to the next hip beach around and enjoys the company of his Kindle. He also trains and mentors data science aspirants and fledgling start-ups.

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