HPC Facilities for UK Theory UKMHD Consortium and

HPC Facilities for UK Theory UKMHD Consortium and DIRAC resources

HPC – UKMHD • UKMHD Consortium • • • Split into 3 projects. UKMHD 1 – Solar and planetary interiors UKMHD 2 – Solar atmosphere (MHD and kinetic) UKMHD 3 – Astrophysical MHD Dirac 2 – Durham, Leicester, Cambridge – UKMHD 2 used 5. 2 M CPUh (2016), 8. 7 M CPUh (2017), 11. 5 M CPUh (2018) Total 25. 4 M CPUh used over 3 years Similar for other MHD projects Reapplication for more Dirac 2 time for 2019 – awaiting outcome – in general good reviews Dirac 3 – Case made to BEIS – been delayed until 2019 (originally 2017) – but upgrade to Dirac 2.

UKMHD 2 Allocation/Useage Facility CPU hours used CPU hours allocated Useage fraction cosma 6 16, 865, 395: 13: 20 17, 700, 000 0. 953 hpcs 3, 910, 449: 02: 59 4, 235, 000 0. 923 cosma 3, 211, 614: 01: 20 750, 000 4. 282 csd 3 cpu 1, 485, 356: 21: 14 1, 480, 000 1. 004 Plus small amounts on Blue Gene and csd 3 gpu

HPC – Resources for Theory DIRAC application (2018 for 2019 start) • Projects limited to 9 pages for the science case. • Hence, limited number of actual cases listed (all have STFC funding). • Others not included but not excluded for HPC resources. • Just contact me and we will try to help. • If time used up, within one quarter, jobs go onto a pauper queue. Still run but delay in getting started. • UKMHD consistently exceeded their allocations at Durham and Cambridge.

HPC – Resources for Theory High resolution required to compete internationally. Need a lot of RAM, i. e. many processors running in parallel. Double resolution in 3 D => 16 times longer to run. 1000^3 => 200 Gb per snapshot. 200 snapshots per simulation => 40 Tb per simulation. How many simulations per project? Need a lot of storage and not just at the HPC host site. Funding. £ 0. 3 M per year secures HPC for solar theory community.