About the Authors

Srinath Perera is a Senior Software Architect at WSO2 Inc., where he overlooks the overall WSO2 platform architecture with the CTO. He also serves as a Research Scientist at Lanka Software Foundation and teaches as a visiting faculty at Department of Computer Science and Engineering, University of Moratuwa. He is a co-founder of Apache Axis2 open source project, and he has been involved with the Apache Web Service project since 2002, and is a member of Apache Software foundation and Apache Web Service project PMC. Srinath is also a committer of Apache open source projects Axis, Axis2, and Geronimo.

He received his Ph.D. and M.Sc. in Computer Sciences from Indiana University, Bloomington, USA and received his Bachelor of Science in Computer Science and Engineering from University of Moratuwa, Sri Lanka.

Srinath has authored many technical and peer reviewed research articles, and more detail can be found from his website. He is also a frequent speaker at technical venues.

He has worked with large-scale distributed systems for a long time. He closely works with Big Data technologies, such as Hadoop and Cassandra daily. He also teaches a parallel programming graduate class at University of Moratuwa, which is primarily based on Hadoop.

I would like to thank my wife Miyuru and my parents, whose never-ending support keeps me going. I also like to thanks Sanjiva from WSO2 who encourage us to make our mark even though project like these are not in the job description. Finally I would like to thank my colleges at WSO2 for ideas and companionship that have shaped the book in many ways.

Thilina Gunarathne is a Ph.D. candidate at the School of Informatics and Computing of Indiana University. He has extensive experience in using Apache Hadoop and related technologies for large-scale data intensive computations. His current work focuses on developing technologies to perform scalable and efficient large-scale data intensive computations on cloud environments.

Thilina has published many articles and peer reviewed research papers in the areas of distributed and parallel computing, including several papers on extending MapReduce model to perform efficient data mining and data analytics computations on clouds. Thilina is a regular presenter in both academic as well as industry settings.

Thilina has contributed to several open source projects at Apache Software Foundation as a committer and a PMC member since 2005. Before starting the graduate studies, Thilina worked as a Senior Software Engineer at WSO2 Inc., focusing on open source middleware development. Thilina received his B.Sc. in Computer Science and Engineering from University of Moratuwa, Sri Lanka, in 2006 and received his M.Sc. in Computer Science from Indiana University, Bloomington, in 2009. Thilina expects to receive his doctorate in the field of distributed and parallel computing in 2013.

This book would not have been a success without the direct and indirect help from many people. Thanks to my wife and my son for putting up with me for all the missing family times and for providing me with love and encouragement throughout the writing period. Thanks to my parents, without whose love, guidance and encouragement, I would not be where I am today.

Thanks to my advisor Prof. Geoffrey Fox for his excellent guidance and providing me with the environment to work on Hadoop and related technologies. Thanks to the HBase, Mahout, Pig, Hive, Nutch, and Lucene communities for developing great open source products. Thanks to Apache Software Foundation for fostering vibrant open source communities.

Thanks to the editorial staff at Packt, for providing me the opportunity to write this book and for providing feedback and guidance throughout the process. Thanks to the reviewers for reviewing this book, catching my mistakes, and for the many useful suggestions.

Thanks to all of my past and present mentors and teachers, including Dr. Sanjiva Weerawarana of WSO2, Prof. Dennis Gannon, Prof. Judy Qiu, Prof. Beth Plale, all my professors at Indiana University and University of Moratuwa for all the knowledge and guidance they gave me. Thanks to all my past and present colleagues for many insightful discussions and the knowledge they shared with me.

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