1. Running OpenIFS on HECToR
Glenn Carver* Rosalyn Hatcher** Grenville Lister** Mark Richardson†
* ECMWF, ** NCAS-CMS, † NAG

2. Running OpenIFS on HECToR
CMS hosts an OpenIFS FCM code repository on PUMA
Code available over the web
Accessible to those with an OpenIFS licence
Reading and Manchester have licenses
Glenn & Ros maintain list of authorized users

3. Running OpenIFS on HECToR
HECToR code installation FCM grib_api eckit ecbuild FDB Mars Metview

4. Running OpenIFS on HECToR
HECToR OpenIFS build
a few lines of scripting (template provided)
driven by a simple FCM configuration file
HECToR job submission
simple batch scheduler (PBS) script
Sample jobs
T159 T511 T1279 supplied by Glenn
start data, namelists

5. Running OpenIFS on HECToR

6. Running OpenIFS on HECToR
DCSE Project OpenIFS FDB IO single writer replaced with parallel IO model – hide IO cost Important for high-resolution modelling and/or creating lots of data

7. Running OpenIFS on HECToR

8. Running OpenIFS on a desktop
OpenIFS supports gfortran, pgi, intel, ibm, cray compilers
SUSe desktop 8 core Intel i7 32Gb
T159L60 4 OMP threads 20 days/hr (30m ts, gfortran)
T511L60 2 MPI tasks, 4 OMP threads, 1 day/1.6 hrs (15m ts)
IO-dependent performance (non FDB)