Book Image

Learning Apache Spark 2

Book Image

Learning Apache Spark 2

Overview of this book

Apache Spark has seen an unprecedented growth in terms of its adoption over the last few years, mainly because of its speed, diversity and real-time data processing capabilities. It has quickly become the preferred choice of tool for many Big Data professionals looking to find quick insights from large chunks of data. This book introduces you to the Apache Spark framework, and familiarizes you with all the latest features and capabilities introduced in Spark 2. Starting with a detailed introduction to Spark’s architecture and the installation procedure, this book covers everything you need to know about the Spark framework in the most practical manner. You will learn how to perform the basic ETL activities using Spark, and work with different components of Spark such as Spark SQL, as well as the Dataset and DataFrame APIs for manipulating your data. Then, you will perform machine learning using Spark MLlib, as well as perform streaming analytics and graph processing using the Spark Streaming and GraphX modules respectively. The book also gives special emphasis on deploying your Spark models, and how they can be operated in a clustered mode. During the course of the book, you will come across implementations of different real-world use-cases and examples, giving you the hands-on knowledge you need to use Apache Spark in the best possible manner.
Table of Contents (18 chapters)
Learning Apache Spark 2
Credits
About the Author
About the Reviewers
www.packtpub.com
Customer Feedback
Preface

What is a recommendation system?


We come across recommendation systems on almost a daily basis, whether you are buying stuff from Amazon, watching movies on Netflix, playing games on Xbox, finding news articles on Google, or listening to music with Spotify. These online applications recommend items based on your previous history, or users who have similar interests.

Figure 9.1: Recommendation system on Amazon

Why has recommendation become such a big thing in our lives when 15-20 years ago in a typical brick and mortar store this was unheard of? The answer lies in the fact that we are now in an era of abundance rather than scarcity. Let's drill down a bit more into this. 20 years ago, the number of products that a typical retailer stocked were limited. The reason is the limit of shelf space and expensive real estate cost.

Similarly, our favourite movie shop would only contain a limited number of movies and our book seller would contain a limited number of books. I still remember 20 years ago...