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

Chapter 4. Working with External Data Sources

Apache Spark depends upon the big data pipeline to get data. The pipeline starts with source systems. The source system data ingress can be arbitrarily complex due to the following reasons:

  • Nature of the data (relational, non-relational)
  • Data being dirty (yes, it's more of a rule than exception)
  • Source data being at a different level of normalization (SAP data, for example, has an extremely high degree of normalization)
  • Lack of consistency in the data (data needs to be harmonized so that it speaks the same language)

In this chapter, we will explore how Apache Spark connects to various data sources. This chapter is divided into the following recipes:

  • Loading data from the local filesystem
  • Loading data from HDFS
  • Loading data from Amazon S3
  • Loading data from Apache Cassandra