SCCS Colloquium - Mar 7, 2019

From Sccswiki
Jump to navigation Jump to search
Date: Mar 7, 2019
Room: 00.08.053
Time: 15:00 - 15:30

Christoph Honal: Efficient I/O Strategies for Checkpointing and Visualization in sam(oa)²

This is a Bachelor's Thesis submission talk advised by Leonhard Rannabauer.

The implementation of large-scale finite-element simulations on distributed systems requires specific memory management and disk I/O handling. This is due to the immense spatial and temporal resolutions and the grade of heterogeneous parallelization, i.e. hybrid MPI/OpenMP. In this thesis, a new approach for storing, visualizing and restoring (referred to as checkpointing) simulation data in the sam(oa)² project is presented, introducing a parallel storage system based on the HDF5 and XDMF file formats. The presented implementation measurably reduces disk space usage and file system strain, while improving run-time performance compared to previous output formats.

Keywords: Tsunami simulation, samoa, I/O, MPI, HDF5, XDMF

Language: English Eng small.jpg