MongoDB MapReduce with Hadoop

at June 20th, 2013

This article is part two of two detailing my talk at MongoDB San Francisco 2013. The video and slides for the entire talk can be found here. Part one can be found here. Mongo offers the useful feature of MapReducing over a collection, making it possible to run operations that don’t necessarily fit Mongo’s normal… Read More


MongoDB Data Locality

at June 18th, 2013

This article is part one of two detailing my talk at MongoDB San Francisco 2013. The video and slides for the entire talk can be found here. Before selling a Groupon for two hours of trampoline jump time we must find and contact a high-quality purveyor of jumping. To do this, we acquire as much… Read More


tdsql, a Teradata command line interface

at August 8th, 2012

At Groupon, we crunch a lot of data. When you run a site that gets billions of requests per day, and need to do analyses that might span activity logs, purchase records, and system data, it adds up to gigabytes of new data per day—and that’s just for the United States! One of the many… Read More