What's New in the Second Edition?

The second edition has two new chapters on Sqoop and Hive (Chapters 15 and 17, respectively), a new section covering Avro (in Chapter 12), an introduction to the new security features in Hadoop (in Chapter 10), and a new case study on analyzing massive network graphs using Hadoop.

This edition continues to describe the 0.20 release series of Apache Hadoop, because this was the latest stable release at the time of writing. New features from later releases are occasionally mentioned in the text, however, with reference to the version that they were introduced in.