Challenges and solutions to run and analyse large cosmological simulation boxes IllustrisTNG and MillenniumTNG

25 Sept 2024

Speaker: Rüdiger Pakmor (Max Planck Institute for Astrophysics)

Abstract:

Large cosmological boxes are a crucial tool to understand the universe and to interpret ongoing and future cosmological surveys. The largest cosmological boxes simulations are among the biggest simulations run on current supercomputers. I will discuss our experiences running and analysing them, with a focus on the technical, machine, algorithmic problems we encountered when running MillenniumTNG (10^11 resolution elements, 122000 cores on Supermuc-NG, 170M core-h) and the solutions we came up with to overcome them.