About the Reviewers

Dedunu Dhananjaya is a senior software engineer in personalized learning and analytics at Pearson. He is interested in data science and analytics. Prior to Pearson, Dedunu worked at Zaizi, LIRNEasia, and WSO2. Currently, he is reading his masters in applied statistics at the University of Colombo.

Wissem El Khlifi is the first Oracle ACE from Spain and an Oracle Certified Professional DBA with over 12 years of IT experience.

He earned his computer science engineering degree from FST Tunisia and master's in computer science as well as in big data science analytics and management from UPC Barcelona. His areas of interest are Linux system administration, high availability Oracle databases, big data NOSQL database management, and big data analysis.

His career has included the following roles: Oracle and Java analyst/programmer, Oracle DBA, architect, team leader, and big data scientist. He currently works as a senior database and applications engineer for Schneider Electric/APC. He writes numerous articles on his website, http://www.oracle-class.com, and his Twitter handle is @orawiss.

Randal Scott King is the managing partner of Brilliant Data, a consulting firm specializing in data analytics. In his years of consulting, Scott has amassed an impressive list of clientele, from mid-market leaders to Fortune 500 household names. In addition to Hadoop Blueprints, he has also served as technical reviewer for other Packt Publishing books on big data and has authored the instructional videos Learning Hadoop 2 and Mastering Hadoop. Scott lives just outside Atlanta, GA, with his children. You can visit his blog at http://www.randalscottking.com.