Book Image

Apache Spark 2.x Cookbook

By : Rishi Yadav
Book Image

Apache Spark 2.x Cookbook

By: Rishi Yadav

Overview of this book

While Apache Spark 1.x gained a lot of traction and adoption in the early years, Spark 2.x delivers notable improvements in the areas of API, schema awareness, Performance, Structured Streaming, and simplifying building blocks to build better, faster, smarter, and more accessible big data applications. This book uncovers all these features in the form of structured recipes to analyze and mature large and complex sets of data. Starting with installing and configuring Apache Spark with various cluster managers, you will learn to set up development environments. Further on, you will be introduced to working with RDDs, DataFrames and Datasets to operate on schema aware data, and real-time streaming with various sources such as Twitter Stream and Apache Kafka. You will also work through recipes on machine learning, including supervised learning, unsupervised learning & recommendation engines in Spark. Last but not least, the final few chapters delve deeper into the concepts of graph processing using GraphX, securing your implementations, cluster optimization, and troubleshooting.
Table of Contents (19 chapters)
Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Fundamental operations on graphs


In this recipe, we will learn how to create graphs and do basic operations on them.

Getting ready

As a starting example, we will have three vertices, each representing the city center of three cities in California—Santa Clara, Fremont, and San Francisco. The following is a roughly drawn out geographic position of the three cities (not to scale):

The following is the distance between these cities:

Source

Destination

Distance (miles)

Santa Clara, CA

Fremont, CA

20

Fremont, CA

San Francisco, CA

44

San Francisco, CA

Santa Clara, CA

53

How to do it...

  1. Import the graphx related classes:
scala> import org.apache.spark.graphx._
scala> import org.apache.spark.rdd.RDD
  1. Load the vertex data in an array:
scala> val vertices = Array((1L, ("Santa Clara","CA")),(2L, 
          ("Fremont","CA")),(3L, ("San Francisco","CA")))
  1. Load the array of vertices into the RDD of vertices:
scala> val vrdd = sc.parallelize(vertices)
  1. Load the edge data in an array:
scala> val edges = Array(Edge...