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Apache Spark 2.x for Java Developers

You're reading from Apache Spark 2.x for Java Developers

Product type Book

Published in Jul 2017

Publisher Packt

ISBN-13 9781787126497

Pages 350 pages

Edition 1st Edition

Languages

Concepts

Authors (2):

Sourav Gulati

Sumit Kumar

View More author details

Table of Contents (19) Chapters

Title Page

Credits

Foreword

About the Authors

About the Reviewer

www.PacktPub.com

Customer Feedback

Preface

1. Introduction to Spark

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

Spark application in distributed-mode

A Spark application is made of up of Driver and Executor(s) processes. Each application in Spark contains one driver process and one or more executor processes. The driver is the central coordinator of the application that drives the application. Spark Driver communicates and divides work among one or more executors. In distributed mode, Spark driver and each executor runs in separate JVM.

Logical Representation of a Spark Application in Distributed Mode

Driver program

SparkContext is initialized in the Driver JVM. Spark driver can be considered as the master of Spark applications. The following are the responsibilities of Spark Driver program:

It creates the physical plan of execution of tasks based on the DAG of operations.
It schedules the tasks on the executors. It passes the task bundle to executors based. Data locality principle is used while passing the tasks to executors.
Spark driver tracks RDD partitions to executor mapping for executing future tasks...

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Authors (2)

Sourav Gulati

Sourav Gulati is associated with software industry for more than 7 years. He started his career with Unix/Linux and Java and then moved towards big data and NoSQL World. He has worked on various big data projects. He has recently started a technical blog called Technical Learning as well. Apart from IT world, he loves to read about mythology.

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Sumit Kumar

Sumit Kumar is a developer with industry insights in telecom and banking. At different junctures, he has worked as a Java and SQL developer, but it is shell scripting that he finds both challenging and satisfying at the same time. Currently, he delivers big data projects focused on batch/near-real-time analytics and the distributed indexed querying system. Besides IT, he takes a keen interest in human and ecological issues.

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