Computational performance

Scaling and Performance

Typical resource requirements on raijin are:

Model	Grid spacing	Domain	Baroclinic timestep (s)	MOM cores	CICE cores	Walltime (hr/yr)	CPU (hr/yr)	Memory (Gb)
ACCESS-OM2	1°	360 × 300 × 50	5400	216	24	0.38	118	83
ACCESS-OM2-025	0.25°	1440 × 1080 × 50	1350-1800	1455	361	2.6	4,700	522
ACCESS-OM2-01	0.1°	3600 × 2700 × 75	540	4358	799	10.4	68,000	2437

Scaling and performance are discussed in sec 3 of Kiss et al. 2019; the corresponding plot scripts and data are here. Note that the current 0.1 degree configuration (in table above) requires about half the walltime and CPU hours of the configuration in table 2 of the paper.

Details of run performance are given in .csv tables auto-generated by https://github.com/aekiss/run_summary in /g/data/hh5/tmp/cosima/access-om2-run-summaries on NCI. Some analysis plots using this data are here.