Book Image

Hadoop Real-World Solutions Cookbook - Second Edition

By : Tanmay Deshpande
Book Image

Hadoop Real-World Solutions Cookbook - Second Edition

By: Tanmay Deshpande

Overview of this book

Big data is the current requirement. Most organizations produce huge amount of data every day. With the arrival of Hadoop-like tools, it has become easier for everyone to solve big data problems with great efficiency and at minimal cost. Grasping Machine Learning techniques will help you greatly in building predictive models and using this data to make the right decisions for your organization. Hadoop Real World Solutions Cookbook gives readers insights into learning and mastering big data via recipes. The book not only clarifies most big data tools in the market but also provides best practices for using them. The book provides recipes that are based on the latest versions of Apache Hadoop 2.X, YARN, Hive, Pig, Sqoop, Flume, Apache Spark, Mahout and many more such ecosystem tools. This real-world-solution cookbook is packed with handy recipes you can apply to your own everyday issues. Each chapter provides in-depth recipes that can be referenced easily. This book provides detailed practices on the latest technologies such as YARN and Apache Spark. Readers will be able to consider themselves as big data experts on completion of this book. This guide is an invaluable tutorial if you are planning to implement a big data warehouse for your business.
Table of Contents (18 chapters)
Hadoop Real-World Solutions Cookbook Second Edition
Credits
About the Author
Acknowledgements
About the Reviewer
www.PacktPub.com
Preface
Index

Processing JSON data in Hive using JSON SerDe


These days, JSON is a very common data structure that's used for data communication and storage. Its key value-based structure gives great flexibility in handling data. In this recipe, we are going to take a look at how to process data stored in the JSON format in Hive. Hive does not have any built-in support to handle JSON, so we will be using JSON SerDe. SerDe is a program that consists of a serializer and deserializer, which tell Hive how to read and write data.

Getting ready

To perform this recipe, you should have a running Hadoop cluster with the latest version of Hive installed on it. Here, I am using Hive 1.2.1. Apart from Hive, we also need JSON SerDe.

There are various JSON SerDe binaries available from various developers. The most popular, though, can be found at https://github.com/rcongiu/Hive-JSON-Serde.

This project contains code for JSON SerDe and is compatible with the latest version of Hive. You can either download the code and build...