Most of the January 6, 2017 meeting of the Hadoop Working Group was taken to see a description, presentation and demonstration of Jigsaw, a software application and interface from Outcomes Insights. The application runs on Apache Hadoop and Apache Impala and leverages the OMOP CDM structure. It is designed to design observational studies among other things. The presentation portion will be uploaded to Hadoop WG wiki section. Link to youtube based video and audio recording below:
https://www.youtube.com/watch?v=e1GT--3A4dY