ECMWF Computing & Forecasting System
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1 ECMWF Computing & Forecasting System icas 2015, Annecy, Sept 2015 Isabella Weger, Deputy Director of Computing ECMWF September 17, 2015
2 October 29, 2014
3 ATMOSPHERE MONITORING SERVICE CLIMATE CHANGE SERVICE October 29, 2014
4 The operational forecasting system km 18/36 km 36 km High resolution forecast (HRES): twice per day 16 km 137-level, to 10 days ahead Ensemble forecast (ENS): twice per day 51 members, 32/64 km 91-level, to 15 days ahead Monthly ENS extension: twice a week (Mon/Thursdays) 51 members, 64 km 62 levels, to 46 days ahead Seasonal forecast (SEAS): once a month (coupled to ocean model) 41 members, 80 km 91 levels, to 7 months ahead Ocean wave forecasts (HRES, ENS and SEAS) Re-forecasts for calibration of ENS and SEAS Reanalyses for atmosphere and oceans Upcoming resolution upgrade (spring 2016) RESOLUTION UPGRADE SPRING 2016 Slide 6
5 ECMWF planned reanalysis productions and data volumes Reanalysis productions ERA-Interim ERA-Interim/Land 1979 NRT, 79km resolution 50Tb data from different observing systems consistent view of global climate ERA-20C ERA-20CM ERA-20C/Land ERA5 ERA5/Land CERA-20C CERA-20C/Carbon ERA6 ERA6/Carbon Source: Dick Dee 20th-century atmospheric reanalysis 300Tb , 125km resolution ERA-Interim successor 1.5Pb 1979 NRT, 31km resolution 20 th -century atmos / ocean reanalysis , 125km/1x1 5Pb ERA5 successor coupled with ocean? 10Pb Climate Change Service (C3S) October 29, 2014
6 Evolution of model resolution and HPC sustained performance EUROPEAN CENTRE FOR MEDIUM-RANGE WEATHER FORECASTS October 29,
7 ECMWF s High Performance Computing Facility EUROPEAN CENTRE FOR MEDIUM-RANGE WEATHER FORECASTS October 29,
8 HPCF Configuration Cray XC-30 Compute clusters 2 Sustained performance 200 on ECMWF codes (teraflops) EACH COMPUTE CLUSTER Parallel Compute nodes 3,400 Pre-/Post-processing 100 Compute cores 84,000 High Performance 7 Parallel Storage (petabytes) General-purpose storage (terabytes) EACH COMPUTE NODE Memory in compute node (gibibytes) Processor type (60 x 128, 4 x 256) Intel E5-2697v2 Ivy Bridge CPU chips per node 2 Cores per CPU chip 12 Clock frequency 2.7 (gigahertz) EUROPEAN CENTRE FOR MEDIUM-RANGE WEATHER FORECASTS October 29,
9 Migration to the new HPC Installation Acceptance Applications Scheduling I/O performance Service availability Support EUROPEAN CENTRE FOR MEDIUM-RANGE WEATHER FORECASTS October 29,
10 Data Archive Data archival and retrieval system for all ECMWF data 123PB primary data (Sept 2015) Adding ~135TB/day Large meteorological archive Direct access from Member States Available to research community worldwide User access via ECMWF developed applications MARS Meteorological Archival and Retrieval System Access via meteorological terms, e.g. fields ECFS ECMWF Common File System File based access for non-meteorological data October 29, 2014
11 Challenges? Strategy Scalability Future HPC Data centre EUROPEAN CENTRE FOR MEDIUM-RANGE WEATHER FORECASTS 14
12 What is the challenge? Today: Tomorrow: Observations Models Volume 20 million = 2 x million grid points 100 levels 10 prognostic variables = 5 x 10 9 Type 98% from 60 different satellite instruments Observations physical parameters of atmosphere, waves, ocean Models Volume 200 million = 2 x million grid points 200 levels 100 prognostic variables = 1 x Type 98% from 80 different satellite instruments physical and chemical parameters of atmosphere, waves, ocean, ice, vegetation Factor 10 Factor 2000 per day per time step
13 Future HPC requirements and Scalability Ensemble Single Power limit M electricity/year 2015/ Source: Peter Bauer
14 Hardware vendors ECMWF Scalability Programme International Community ECMWF Member States
15 Board: ECMWF Scalability Programme ECMWF, NHMS s, Regional consortia Projects: Observation processing (COPE) Data assimilation (OOPS) Numerical methods (Polymitos) Model output Processing (Hermes) IFS code adaptation (OAFS) ESCAPE ESiWACE Earth server2 NextGenI O Computer architecture support (CAS)
16 ECMWF the science of weather prediction
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