Online Program Home
My Program

Abstract Details

Activity Number: 462 - Making an Impact When Things Make Impacts
Type: Topic Contributed
Date/Time: Wednesday, July 31, 2019 : 8:30 AM to 10:20 AM
Sponsor: Uncertainty Quantification in Complex Systems Interest Group
Abstract #306813 Presentation
Title: Crashing into the Moon by Partitioning Large Simulations
Author(s): Kary Myers*
Companies: Los Alamos National Laboratory
Keywords: uncertainty quantification; large scale simulation; in situ analysis
Abstract:

As computer simulations continue to grow in size and complexity, they present a particularly challenging class of big data problems. Large scale simulations can generate output that exceeds both the storage capacity and the bandwidth available for transfer to storage, making post-processing and analysis challenging. One approach is to embed some analyses in the simulation while the simulation is running -- a strategy often called in situ analysis -- to reduce the need for transfer to storage. Another strategy is to save only a reduced set of time steps rather than the full simulation. Our work combines both of these ideas to introduce an online in situ method for identifying a reduced set of time steps of the simulation to save. Our approach significantly reduces the data transfer and storage requirements, and it provides improved fidelity to the simulation to facilitate post-processing and reconstruction. We illustrate the method with a computer simulation from NASA's 2009 Lunar Crater Observation and Sensing Satellite (LCROSS) mission, in which a rocket impacted the lunar South Pole to create a measurable debris plume above the Moon’s surface.


Authors who are presenting talks have a * after their name.

Back to the full JSM 2019 program