July 31, 2017 to August 4, 2017
Fermi National Accelerator Laboratory
US/Central timezone

Large-scale Simulation and Data Processing in the NOvA Experiment

Aug 3, 2017, 2:21 PM
17m
Hornets Nest (Fermi National Accelerator Laboratory)

Hornets Nest

Fermi National Accelerator Laboratory

Presentation Computing, Analysis Tools and Data Handling Computing, Analysis Tools, and Data Handling

Speaker

Adam Moren (University of Minnesota, Duluth)

Description

The NOvA experiment at Fermilab is a long-baseline neutrino experiment designed to study $\nu_{e}$ appearance in a $\nu_{\mu}$ beam. The detectors' fine-grained design and many resultant channels, coupled with the variety of physics triggers, the high-intensity NuMI neutrino beam, and the large cosmic ray muon rate at the far detector location, together result in computing requirements previously unprecedented for a neutrino experiment. NOvA uses numerous advanced computing infrastructure tools to manage this data at high throughput. The 9 petabytes (70 million files) of simulated, raw, and reconstructed data currently maintained by the experiment are stored on tape and archived, catalogued, and addressed using Fermilab's Sequential Access via Metadata (SAM) system. Files are staged into cache areas using a massively extensible and parallelizable system called dCache, allowing sustained total data transfer rates of over 1 Gbps to a worldwide network of processing node farms. The experiment's software code is also deployed worldwide using the CERN VM File System (CVMFS), allowing fast, scaleable, site-independent access to the codebase. These developments enable NOvA to make heavy use of the Fermigrid and Open Science Grid to do simulation and processing, so that in steady state production, in excess of 10 million neutrino interactions can be simulated and analyzed per day. NOvA's extensive use of new computing tools continues to support the broad physics program that the experiment hosts, and has paved the way for their use by other current and future Intensity Frontier experiments at Fermilab.

Primary author

Adam Moren (University of Minnesota, Duluth)

Presentation materials