What's New in the Fourth Edition?

The fourth edition covers Hadoop 2 exclusively. The Hadoop 2 release series is the current active release series and contains the most stable versions of Hadoop.

There are new chapters covering YARN (Chapter 4), Parquet (Chapter 13), Flume (Chapter 14), Crunch (Chapter 18), and Spark (Chapter 19). There’s also a new section to help readers navigate different pathways through the book (What’s in This Book?).

This edition includes two new case studies (Chapters 22 and 23): one on how Hadoop is used in healthcare systems, and another on using Hadoop technologies for genomics data processing. Case studies from the previous editions can now be found online.

Many corrections, updates, and improvements have been made to existing chapters to bring them up to date with the latest releases of Hadoop and its related projects.