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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

Introduction to Property Graph

It is the basic abstraction of the Graphx API. Property is a directed multi-graph where every vertex and edge is associated with a property. Each vertex in the Property Graph is also associated with a unique 64-bit long identifier (VertexId). A directed multi-graph is defined as a directed graph where there can be multiple edges (relationships) between the same vertices, such as A can be a friend and team mate of B.

The following is a logical representation of a Property Graph:

Logical representation of Property Graph

Here, we have a Property Graph consisting of five vertices. Each vertex in the graph consists of a VertexId and a property, which is a string object in this case, and every edge is also associated with a property, which is a string object as well, which describes the relation between the vertices.

Spark stores vertices and edges in different RDDs as follows:

Storage representation of Property Graph

Every element of the RDD of vertices contains a VertexId...

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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.

See other products by Sourav Gulati

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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