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Wahid Bhimji

Wahid Bhimji
Data Architect
Data & Analytics Services
Phone: (510) 486-4710
Fax: (510) 486-6459
1 Cyclotron Road
Mail Stop: 59R4010A
Berkeley, CA 94720 US

Biographical Sketch

Wahid is a Big Data Architect in the Data and Analytics Services team at NERSC. His current interests include machine learning, databases and data management. Wahid has worked for many years in Scientific Computing and Data Analysis in Academia and Government and has a Ph.D. in High-Energy Particle Physics.


Journal Articles

T. Maier, D. Benjamin, W. Bhimji, Elmsheuser, P. van Gemmeren, D. Malon, N. Krumnack, "ATLAS I/O performance optimization in as-deployed environments", J. Phys. Conf. Ser., 2015, 664:042033, doi: 10.1088/1742-6596/664/4/042033 ,

Michela Massimi, Wahid Bhimji, "Computer simulations and experiments: The case of the Higgs boson", Stud. Hist. Philos. Mod. Phys., 2015, 51:71-81, doi: 10.1016/j.shpsb.2015.06.003

Georges Aad, others (ATLAS and CMS Collaborations), "Combined Measurement of the Higgs Boson Mass in pp collisions at sqrt{s}=7 and 8 TeV with the ATLAS and CMS Experiments", Phys. Rev. Lett., 2015, 114:191803, doi: 10.1103/PhysRevLett.114.191803

Georges Aad, others (ATLAS Collaboration), "Identification of Boosted, Hadronically Decaying W and Comparisons with ATLAS Data Taken at sqrt(s) = 8 TeV", Submitted to Eur. Phys. J. C, 2015,

Conference Papers

Evan Racah, Seyoon Ko, Peter Sadowski, Wahid Bhimji, Craig Tull, Sang-Yun Oh, Pierre Baldi, Prabhat, "Revealing Fundamental Physics from the Daya Bay Neutrino Experiment using Deep Neural Networks", ICMLA, 2016,

Tina Declerck, Katie Antypas, Deborah Bard, Wahid Bhimji, Shane Canon, Shreyas Cholia, Helen (Yun) He, Douglas Jacobsen, Prabhat, Nicholas J. Wright, "Cori - A System to Support Data-Intensive Computing", Cray User Group Meeting 2016, London, England, May 2016,

W. Bhimji, D. Bard, M. Romanus, D. Paul, A. Ovsyannikov, B. Friesen, M. Bryson, J. Correa, G. K. Lockwood, V. Tsulaia, S. Byna, S. Farrell, D. Gursoy, C. Daley, V. Beckner, B. Van Straalen, D. Trebotich, C. Tull, G. Weber, N. J. Wright, K. Antypas, Prabhat, "Accelerating Science with the NERSC Burst Buffer Early User Program", Cray User Group, May 11, 2016, LBNL LBNL-1005736,

NVRAM-based Burst Buffers are an important part of the emerging HPC storage landscape. The National Energy Research Scientific Computing Center (NERSC) at Lawrence Berkeley National Laboratory recently installed one of the first Burst Buffer systems as part of its new Cori supercomputer, collaborating with Cray on the development of the DataWarp software. NERSC has a diverse user base comprised of over 6500 users in 700 different projects spanning a wide variety of scientific computing applications. The use-cases of the Burst Buffer at NERSC are therefore also considerable and diverse. We describe here performance measurements and lessons learned from the Burst Buffer Early User Program at NERSC, which selected a number of research projects to gain early access to the Burst Buffer and exercise its capability to enable new scientific advancements. To the best of our knowledge this is the first time a Burst Buffer has been stressed at scale by diverse, real user workloads and therefore these lessons will be of considerable benefit to shaping the developing use of Burst Buffers at HPC centers.

Mostofa Patwary, Nadathur Satish, Narayanan Sundaram, Jialin Liu, Peter Sadowski, Evan Racah, Suren Byna, Craig Tull, Wahid Bhimji, Prabhat, Pradeep Dubey, "PANDA: Extreme Scale Parallel K-Nearest Neighbor on Distributed Architectures", IPDPS 2016, April 5, 2016,


Tina Declerck, Katie Antypas, Deborah Bard, Wahid Bhimji, Shane Canon, Shreyas Cholia, Helen (Yun) He, Douglas Jacobsen, Prabhat, Nicholas J. Wright, Cori - A System to Support Data-Intensive Computing, Cray User Group Meeting 2016, London, England, May 12, 2016,

Yun (Helen) He, Wahid Bhimji, Cori: User Update, NERSC User Group Meeting, March 24, 2016,


Debbie Bard, Wahid Bhimji, David Paul, Glenn K. Lockwood, Nicholas J Wright, Katie Antypas, Prabhat, Steve Farrell, Andrey Ovsyannikov, Melissa Romanus, Brian Van Straalen, David Trebotich, Guenter Weber, "Experiences with the Burst Buffer at NERSC", Supercomputing Conference, November 16, 2016,

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.