The Big Bang theory was not accepted until 1965 with the discovery of the cosmic microwave background
Dark really means we have no idea ;-)
N-body simulation
- A Universe in a Box
- A box of side-length 2.0 h-1Gpc
- 2.1 trillion particles (128003)
Uchuu Results
- The largest simulation of the universe ever created
- 3PB of data generated in the Aterui-II supercomputer
- Reference: arXiv:1711.01453
Storage costs
- 3PB
- 76.800€/month
- 921.600€/year
Big Data
- Goal: Allow large scale analysis of the results
- Selection of 50 epocs
- Transformation of the datasets to parquet
- Interactive analysis using Python Notebooks and Spark
- Uchuu github repo with examples
Benchmarks
| FT-II using Vaex | BigData using Spark | |
|---|---|---|
| Preliminary computations | 109 min | less than 1 min |
| Finding halos | 9 hours only first host | less than 2 min ALL hosts |
| Total time | more than 38 hours | less than 3 min |
Tutorial
8:15
How to pronounce uchuu
- Uchuu means universe in Japanese
- Let's hear Skent from Japan
