We use our own highly customized fork of Hadoop to generate traffic graphs [1] and demographic information for hundreds of thousands of sites from petabytes of

We use our own highly customized fork of Hadoop to generate traffic graphs [1] and demographic information for hundreds of thousands of sites from petabytes of data, as well as building predictive models that power targeted display advertising. [1]: https://www.quantcast.com/tumblr.com https://www.quantcast.com/tumblr.com