About the authors Benoy Antony is an Apache Hadoop Committer and Hadoop Architect at eBay. Konstantin Boudnik is co-founder and CEO of Memcore.io, and is one of the early developers of Hadoop and a co-author of Apache Bigtop. Cheryl Adams is a Senior Cloud Data & Infrastructure Architect in the healthcare data realm. Branky Shao is a software engineer at eBay, and a contributor to the Cascading project. Cazen Lee is a Software Architect at Samsung SDS. Kai Sasaki is a Software Engineer at Treasure Data Inc. Visit us at wrox.com where you have access to free code samples, Programmer to Programmer forums, and discussions on the latest happenings in the industry from around the world.