Ack.tex

\section*{Acknowledgments}
The authors would like to thank Saurabh Jha (UIUC), Tom Tucker (Open Grid Computing),
Kevin Pedretti (SNL), Jason Repik (SNL), and the HMDR team for useful conversations.

This material is based upon work supported by the U.S. Department of Energy,
Office of Science, Office of Advanced Scientific Computing Research, under Award Number 2015-02674.

This research used resources of the National Energy Research Scientific Computing Center (NERSC), a U.S. Department of Energy Office of Science User Facility operated under Contract No. DE-AC02-05CH11231, and Sandia National Laboratories, a multimission laboratory managed and operated
by National Technology \& Engineering Solutions of Sandia, LLC, a wholly owned
subsidiary of Honeywell International Inc., for the U.S. Department of Energy's
National Nuclear Security Administration under contract DE-NA0003525. The views
expressed in the article do not necessarily represent the views of the U.S. Department
of Energy or the United States Government.