Calcolo LHC: Tier-1 e Tier-2

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Domenico Salvatori
6 anni fa
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1 Calcolo LHC: Tier-1 e Tier-2 Donatella Lucchesi, Bruna Bertucci, Gianpaolo Carlino, Sara Pirrone, Paolo Spagnolo, Vincenzo Vagnoni Great performances as shown by the experiments presentations. Here only: - news from Computing Scrutiny Group - INFN budget 2015

2 Activities in the computing scrutiny group - Under scrutiny requests for First evaluation of the 2017 needs - Asked the experiments to study disk space occupancy. Still under discussion which is the best method to monitor. 2

3 Requests and Flat Budget - Experiments should assume to have a "flat budget": annual performance growth of 20% for CPU, 15% for disk and 15% for tape at fixed cost. - Study of the request respect to previous year for Atlas and CMS ATLAS CMS cpu disk tape cpu disk tape % 0.53% 35.31% 70.77% 9.31% 52.48% % 27.03% 29.23% 33.33% 26.92% 35.14% % 23.40% 28.57% 31.25% 36.36% 35.00% not really flat 3

4 Funding Agencies consultation Scrutiny group consulted a number of WLCG resource providers on their expectations over Run 2. The outcome is: In the most promising cases, funding is known out to 2016 or 2017 and sufficient to match requests. For future funding, responses varied from an expectation that requirements could be met over Run 2 to, more commonly, that funding requests might not be met in full and MoU pledges could not be maintained. In two cases provision below current requests is already anticipated 4

5 Computing Model Evolution - Reduced reconstruction and reprocessing demands - Reduced number of data copies, thanks to improved network performances - Distinction between Tier-1 and Tier-2 tasks less and less rigid - Usage of HPC facilities for Monte Carlo production, simulation of very complex devices (FTK) - New data management in progress The referees, management and experiments are proposing to organize one day of discussion on new computing model at the end of January

6 Tier-1 Costs Determination: Background Each year we have to pay for: - new resources: determined following the LHC pledges and requests from experiments - replacements: calculated following the formula for each experiment total_tobe_replaced* resources_experiment_i resources_total year_purchasse We assume: - 20% of overlap in the CPU CU: cpu: ke/hs06 disk: KE/TB-N tape: ke/tb Optimized based on latest tenders and market trends 6

7 Tier-1 Costs in 2015: LHC CPU disk tape HS06 TB-N TB ALICE ATLAS CMS LHC-b New Resources CPU disk tape HS06 TB-N TB ALICE ATLAS CMS LHC-b Total needs CPU disk tape HS06 TB-N TB ALICE ATLAS CMS LHC-b Replacements 2015 CPU disk tape ke ke ke ALICE ATLAS CMS LHC-b Total cost 7

8 Tier-1 Costs in 2015: NON-LHC Talk di G. Carlino CSN1 CPU disk tape ke ke ke LHCb T Babar Belle CDF KLOE LHCf NA Totale ke sj Commenti: LHCb T2: 47 ke risorse nuove + 25 ke rimpiazzi Belle2: tutte risorse nuove CDF: rimpiazzo LHCf: risorse nuove NA62: risorse nuove 8

9 Tier-2 Performances in the 2014 We had a monitor... Using EGI inclusive plots Contacted CNAF and GE to find someone to fix the our tool 9

10 Tier-2 Requests and Proposal 2015: CMS CMS CPU CPU CPU CPU CPU CPU Rich. Rimp. RichT Rich.T Prop. Prop. HS06 HS06 HS06 ke HS06 ke Bari LNL Pisa Roma Tot. T Contributo Recas CMS DISCO DISCO DISCO DISCO DISCO DISCO Rete Altre CPU Rete Altre CPUTotale Tot Rich. Rimp. RichT Rich. Prop. Prop. Rich. Prop. Rich. Prop. TBN TBN TBN ke TBN ke ke ke ke ke ke ke Bari LNL Pisa Roma Tot. T CU: cpu: ke/hs06 disk: KE/TB-N Si suggerisce di finanziare: - nuove CPU + 70% rimpiazzi - tutto il disco 10

11 Tier-2 Requests and Proposal 2015: ATLAS ATLAS CPU CPU CPU CPU CPU CPU Rich. Rimp. Rich.To Rich. Prop. Prop. HS06 HS06 HS06 KE HS06 ke LNF Milano Napoli Roma Tot. T Stessi CU di CMS Stesso taglio sui rimpiazzi Contributo Recas DISCO DISCO DISCO DISCO DISCO DISCO Rete Altre CP Rete Altre CPUTotale Totale Rich. Rimp. TOT Rich. Prop. Prop. Rich. Prop. Rich. Prop. TBN TBN TBN ke TBN ke ke ke ke ke ke ke Si chiede di anticipare al 2014: 100 ke di LNF per far iniziare una attivita' di cooperazione INFN-INAF 8 ke "consumo" Napoli 11

12 Tier-2 Resources for 2016 Proposta: introdurre un fattore di overlap nelle CPU come gia facciamo per il Tier-1 anche per i Tier-2 multi-esperimento: - studiare nel 2015 in modo da ottimizzare il fattore di overlap 12

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