Big Data Benchmarks, Performance Optimization, and Emerging Hardware 4th and 5th Workshops, BPOE 2014, Salt Lake City, USA, March 1, 2014 and Hangzhou, China, September 5, 2014, Revised Selected Papers - Zhan, Jianfeng; Han, Rui; Weng, Chuliang (Springer International Publishing : Imprint: Springer, 2014)