Tilmann Rabl, Raghunath Nambiar, Chaitanya K. Baru, Milind A. Bhandarkar, Meikel Poess, Saumyadipta Pyne: Big Data Benchmarking - 6th International Workshop, WBDB 2015, Toronto, ON, Canada, June 16-17, 2015 and 7th International Workshop, WBDB 2015, New Delhi, India, December 14-15, 2015, Revised Selected Papers. Lecture Notes in Computer Science 10044, Springer 2016, ISBN 978-3-319-49747-1