Technical Highlights from the ExaHDF5 project Prabhat, Kesheng Wu, Jerry Chou, Suren Byna, Mark Howison, E. Wes Bethel Lawrence Berkeley National Laboratory Quincey Koziol, Peter Cao, Mohamad Charawi, Christian Chilan, Mike McGreevy The HDF Group Karen Schuchardt, Bruce Palmer Pacific Northwest National Laboratory DISCLAIMER: This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any agency thereof, nor the Regents of the University of California, nor any of their employees, makes any warranty, express or implied, or assumes any legal responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by its trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof, or the Regents of the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof or the Regents of the University of California. Acknowledgments: This work was supported by the Director, Office of Science, Office and Advanced Scientific Computing Research, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 through the ASCR Exascale Scientific Data Management award. This work used computational resources provided by NERSC.