His also a founding member of the Apache Beam PMC. Though deeply passionate and vocal about the capabilities and importance of stream processing, he is also a firm believer in batch and streaming as two sides of the same coin, with the real endgame for data processing systems the seamless merging between the two. He is the author of the Streaming Systems book from O'Reilly, the 2015 Dataflow Model paper, and the Streaming 101 and Streaming 102 articles. His preferred mode of transportation is by cargo bike, with his two young daughters in tow.