Data Services for Visualization and Analysis - ASC Level II Milestone (7186)
Sandia National Laboratories (SNL-CA), Livermore, CA (United States), Gary Templet, USDOE Assistant Secretary for Human Resources and Administration, Sandia National Laboratories (SNL), Albuquerque, NM (United States). New Mexico Small Business Assistance (NMSBA) Program, NM (United States), Matthew Glickman, Todd Kordenbrock, Scott Levy, Gerald Lofstead, Jeff Mauldin, Thomas Otahal, Craig Ulmer, Patrick M Widener, Ron A. Oldfield · 2020
A new in transit Data Service is presented and compared to the traditional file-based workflow and the newly refactored in situ Catalyst workflow. Each workflow is enabled by the IOSS mesh interface equipped with data management layers for Exodus and CGNS (file-based), Catalyst (in situ), and FAODEL (in transit). FAODEL is a distributed object store that can transmit data across MPI allocations. Catalyst is a Para View-based visualization capability developed as part of the CSSE Data Services effort. The workflows considered here take SPARC data into Catalyst for visualization post-processing. Although still in unoptimized form, we show that the in transit approach is a viable alternative to file-based and in situ workflows and offers several advantages to both simulation and post-processing developers. Since IOSS is a mature interface with wide adoption across Sandia and externally, each workflow can be reconfigured to use different simulations that generate mesh data and post-processing tools that consume it.