Continuous analytics on geospatial data streams with WSO2 complex event processor.

DEBS Grand Challenge is a yearly, real-life data based event processing challenge posted by Distributed Event Based Systems conference. The 2015 challenge uses a taxi trip data set from New York city that includes 173 million events collected over the year 2013. This paper presents how we used WSO2 CEP, an open source, commercially available Complex Event Processing Engine, to solve the problem. With a 8-core commodity physical machine, our solution did about 350,000 events/second throughput with mean latency less than one millisecond for both queries. With a VirtualBox VM, our solution did about 50,000 events/second throughput with mean latency of 1 and 6 milliseconds for the first and second queries respectively. The paper will outline the solution, present results, and discuss how we optimized the solution for maximum performance.