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Lisa Gerhardt

Lisa Gerhardt headshot
Lisa Gerhardt
Big Data Architect
Phone: (510) 486-4680
Fax: (510) 486-6459
1 Cyclotron Road
Mail Stop: 59R4010A
Berkeley, CA 94720 US

Biographical Sketch

Lisa Gerhardt completed her Ph.D. in Physics from the University of Irvine in 2007.  Prior to coming to NERSC, Lisa worked in neutrino astrophysics with the IceCube group at Lawrence Berkeley National Laboratory.  She joins the NERSC DAS group to focus on big data and HPC analysis.

Journal Articles

M. G. Aartsen et al., "Flavor Ratio of Astrophysical Neutrinos above 35 TeV in IceCube", Physical Review Letters, February 11, 2015, doi: 10.1103/PhysRevLett.114.171102

IceCube Collaboration: M. G. Aartsen et al, "Energy Reconstruction Methods in the IceCube Neutrino Telescope", Journal of Instrumentation 9 P03009, March 2014,

M. G. Aartsen et al., "Search for non-relativistic Magnetic Monopoles with IceCube", European Physics Journal, February 14, 2014, doi: 10.1140/epjc/s10052-014-2938-8

IceCube Collaboration: M. G. Aartsen et al, "Improvement in Fast Particle Track Reconstruction with Robust Statistics", Nuclear Instruments and Methods A736 143-149, February 2014,

IceCube Collaboration: M. G. Aartsen et al, "Search for Time-Independent Neutrino Emission from Astrophysical Sources with 3 yr of IceCube Data", Astrophysical Journal 779 132, December 2013,

IceCube Collaboration: M. G. Aartsen et al, "Probing the Origin of Cosmic Rays with Extremely High Energy Neutrinos Using the IceCube Observatory", Physical Review D88 112008, December 2013,

IceCube Collaboration: M. G. Aartsen et al, "An IceCube Search for Dark Matter Annihilation in Nearby Galaxies and Galaxy Clusters", Physical Review D88 122001, December 2013,

IceCube Collaboration: M. G. Aartsen et al, "Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector", Science 342 1242856, November 2013,

IceCube Collaboration: M. G. Aartsen et al, "South Pole Glacial Climate Reconstruction from Multi-Borehole Laser Particulate Stratigraphy", Journal of Glaciology 59 1117-1128, October 2013,

IceCube Collaboration: M. G. Aartsen et al, "Measurement of the Cosmic Ray Energy Spectrum with IceTop-73", Physical Review D88 042004, August 28, 2013,

IceCube Collaboration: R. Abbasi et al, "Measurement of Atmospheric Neutrino Oscillations with IceCube", Physical Review Letters 111 081801, August 2013,

IceCube Collaboration: R. Abbasi et al, "First Observation of PeV-energy Neutrinos with IceCube", Physical Review Letters 111 021103, July 2013,

IceCube Collaboration: M. G. Aartsen et al., "Measurement of South Pole Ice Transparency with the IceCube LED Calibration System", Nuclear Instruments and Methods A711 73-89, May 2013,

Conference Papers

Alex Gittens et al, "Matrix Factorization at Scale: a Comparison of Scientific Data Analytics in Spark and C+MPI Using Three Case Studies", 2016 IEEE International Conference on Big Data, July 1, 2017,

Jialin Liu, Evan Racah, Quincey Koziol, Richard Shane Canon,
Alex Gittens, Lisa Gerhardt, Suren Byna, Mike F. Ringenburg, Prabhat,
"H5Spark: Bridging the I/O Gap between Spark and Scientific Data Formats on HPC Systems", Cray User Group, May 13, 2016,

Book Chapters

Sudip Dosanjh, Shane Canon, Jack Deslippe, Kjiersten Fagnan, Richard Gerber, Lisa Gerhardt, Jason Hick, Douglas Jacobsen, David Skinner, Nicholas J. Wright, "Extreme Data Science at the National Energy Research Scientific Computing (NERSC) Center", Proceedings of International Conference on Parallel Programming – ParCo 2013, ( March 26, 2014)


Lisa Gerhardt, Jeff Porter, Nick Balthaser, Lessons Learned from Running an HPSS Globus Endpoint, 2016 HPSS User Forum, September 1, 2016,

The NERSC division of LBNL has been running HPSS in production since 1998. The archive is quite popular with roughly 100TB IO every day from the ~6000 scientists that use the NERSC facility. We maintain a Globus-HPSS endpoint that transfers over 1PB / month of data into and out of HPSS. Getting Globus and HPSS to mesh well can be challenging. This talk gives an overview of some of the lessons learned.

Nicholas Balthaser, Lisa Gerhardt, NERSC Archival Storage: Best Practices, Joint Facilities User Forum on Data-Intensive Computing, June 18, 2014,

Nick Balthaser, NERSC; Lisa Gerhardt, NERSC, Introduction to NERSC Archival Storage: HPSS, February 3, 2014,


Annette Greiner, Evan Racah, Shane Canon, Jialin Liu, Yunjie Liu, Debbie Bard, Lisa Gerhardt, Rollin Thomas, Shreyas Cholia, Jeff Porter, Wahid Bhimji, Quincey Koziol, Prabhat, "Data-Intensive Supercomputing for Science", Berkeley Institute for Data Science (BIDS) Data Science Faire, May 3, 2016,

Review of current DAS activities for a non-NERSC audience.