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FLARE - CSCS Tier 2 LHC Computing Infrastructure

English title FLARE - CSCS Tier 2 LHC Computing Infrastructure
Applicant Donegà Mauro
Number 201466
Funding scheme FLARE
Research institution Institut für Teilchen- und Astrophysik ETH Zürich
Institution of higher education ETH Zurich - ETHZ
Main discipline Particle Physics
Start/End 01.04.2021 - 31.03.2023
Approved amount 1'984'746.00
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Keywords (12)

CSCS; Particle Physics; WLCG; GRID Computing; Large Data handling; CLOUD and HPC; Information and Communication Technology; LHC; ATLAS; CMS; LHCb; Tier-2

Lay Summary (German)

Lead
ZieleDer vorliegende Finanzierungsantrag zielt darauf ab, den Schweizer LHC Rechenbedarf für einen Zeitraum von zwei Jahren auf der HPC-Maschine (High Performance Computing) am CSCS zu decken, und er wird die Schweizer Ressourcen als offiziell anerkanntes nationales Tier-2-Zentrum im Rahmen des WLCG (The Worldwide LHC computing GRID) bereitstellen.
Lay summary

Titel

 

CSCS Tier 2 LHC Computing Infrastructure

 

Thema

 

Nach dem Ende des LHC zweiten Datenperiode (Run-2) wurde der LHC Beschleuniger fuer die Jahre 2019-2021 zur Erneuerung abgeschaltet (Long Shutdown LS2). Die Rekonstruktion und Analyse aller zuvor gesammelten Daten wird unter Anwendung der genauesten Kalibrierungen, und zusammen mit der Produktion der unerlässlichen Monte-Carlo Simulationen durchgeführt. Diese neu verarbeiteten Daten und Monte-Carlo-Samples bilden die sog. "Legacy"-Datensätze für den LHC-Run 2. Der kommende LHC Run 3 wird im Frühjahr 2022 beginnen und bis Ende 2024 dauern. Die erwartete Menge an zu sammelnden Daten wird etwa einer Verdreifachung der bisherigen Datensätze entsprechen.

 

Kontext

 

Die WLCG-Organisation koordiniert die Computing-Infrastruktur aller LHC-Experimente. Im Jahr 2020 belaufen sich die WLCG-Ressourcen, die der Hochenergiephysik (HEP) zur Verfügung stehen, auf etwa 7 MHS06 Rechenleistung, über 570 Petabyte Online-Plattenspeicher und 800 PB Bandspeicher, weltweit verteilt über 150 große offiziellen Standorte. Die globalen durchschnittlichen Datenübertragungsraten liegen weiterhin bei über 40 GB/s, wobei innerhalb der WLCG täglich mehr als 5 Millionen Dateien übertragen werden.

CHIPP und CSCS (Centro Svizzero di Calcolo Scientifico) arbeiten Hand-in-Hand in einer Kooperation, in der das CSCS als das wichtigste "Schweizer Tier-2"-Regionalzentrum fungiert und ATLAS, CMS und LHCb bedient. Die Recheninfrastruktur am CSCS wird auf gemeinsam genutzten Ressourcen innerhalb des großen High-Performance-Computers (HPC) am CSCS (Piz Daint) gehostet.

 

 

Direct link to Lay Summary Last update: 20.04.2021

Lay Summary (English)

Lead
GoalsThe present funding request is aimed at covering the Swiss computing needs for a two years period on the HPC (High Performance Computing) machine at CSCS, and it will provide resources as required from the officially acknowledged national Tier-2 centres as part of WLCG (The Worldwide LHC computing GRID).
Lay summary

Title

 

CSCS Tier 2 LHC Computing Infrastructure

 

Subject

 

After the completion of the LHC Run 2, the accelerator complex is undergoing a long shutdown period (LS2) during the years 2019-2021. The re-processing of all previously accumulated data applying the most accurate calibrations is on-going, together with the production of the needed amount of Monte Carlo (MC) simulation. The re-processed data and Monte Carlo samples constitute the “legacy” data sets for the LHC Run2. The upcoming LHC Run 3 will start in Spring 2022 and extend until the end of 2024. The expected size of the data to be collected will allow to triple the amount of data collected so far.

Context

 

The WLCG organization is the coordination body for the computing infrastructure of all LHC experiments. In 2020 WLCG resources available to High Energy Physics (HEP) amount to about 7 MHS06 of computing power, over 570 Petabytes of online disk storage and 800 PB of tape storage from over 150 large official sites worldwide. The global average data transfer rates have continued to be above 40 GB/s. More than 5 million files are transferred within WLCG daily.

CHIPP and CSCS (Centro Svizzero di Calcolo Scientifico) established a cooperation in which CSCS functions as the major “Swiss Tier-2” regional centre, serving ATLAS, CMS and LHCb. The computing infrastructure at CSCS is hosted on shared resources within the large High-Performance Computer (HPC) at CSCS (Piz Daint).

 

Direct link to Lay Summary Last update: 20.04.2021

Responsible applicant and co-applicants

Employees

Associated projects

Number Title Start Funding scheme
186172 FLARE - Computing Infrastructure for LHC Experiments 01.04.2019 FLARE
204238 Understanding the Flavour Anomalies 01.10.2021 Project funding
204241 Exploring Physics Beyond the Standard Model with Pixelated Particle Detectors 01.10.2021 Project funding
186238 FLARE 2019-2021: Operation, Computing and Upgrades of the CMS Experiment 01.04.2019 FLARE
173601 FLARE - ATLAS Detector Operation and Phase-II Upgrade at the CERN Large Hadron Collider (LHC) 01.04.2017 FLARE
173580 FLARE 2017-2020: Operation and upgrade of the LHCb experiment 01.04.2017 FLARE
204975 Research in High Energy Physics with the CMS detector 01.10.2021 Project funding

Abstract

After the completion of the LHC Run 2, the accelerator complex is undergoing a long shutdown period (LS2) during the years 2019-2020. All LHC experiments are taking advantage of this period to complete several hardware upgrades. From the computing side, the re-processing of all previously accumulated data applying the most accurate calibrations is on-going, together with the production of the needed amount of Monte Carlo (MC) simulation. The re-processed data and Monte Carlo samples constitute the “legacy” data sets for the LHC Run2. These datasets will eventually be the subject of new analyses or will be combined with more data. Because of this, the LHC computing needs have been kept essentially constant, despite being in a long shut down period.The Worldwide LHC computing GRID (WLCG) organization continues to act as the coordination body for the computing infrastructure of all LHC experiments. In 2020 WLCG resources available to High Energy Physics (HEP) amount to about 7 MHS06 of computing power, over 570 Petabytes of online disk storage and 800 PB of tape storage from over 150 large official sites worldwide. The global average data transfer rates have continued to be above 40 GB/s. More than 5 million files are transferred within WLCG daily. The overall status of WLCG is documented in detail by the status reports presented at the CERN Resource Review Board C-RRB meetings.The collaboration with WLCG is formalised through a Memorandum of Understanding (MoU). Switzerland, represented by the Swiss Institute of Particle Physics (CHIPP), has signed a Computing MoU with WLCG, in which it commits to contribute with commensurate resources to WLCG for the profit of the overall LHC community operation. For this purpose, CHIPP and CSCS (Centro Svizzero di Calcolo Scientifico) established a cooperation in which CSCS functions as the major “Swiss Tier-2” regional centre, serving ATLAS, CMS and LHCb. The CHIPP-CSCS cooperation is formalized in a “Collaboration Agreement” (CA) between ETHZ and CHIPP. Originally negotiated in 2007, it has been renewed in July 2018 for the duration 1.1.2019-31.12.2022.In December 2017, the CHIPP computing steering board (its members are all the PIs of this FLARE request) agreed to evolve the Swiss Tier-2 computing system. The computing infrastructure transitioned from dedicated hardware (a Linux cluster named “PHOENIX”) to a model using shared resources within the large High-Performance Computer (HPC) at CSCS (Piz Daint). After a test period of about one year, this mode of operation has been deployed in “production mode” to process all requested experiments workflows (reconstruction and analysis of data events and simulations).The present funding request is aimed at covering the Swiss computing needs for a two years period on the HPC at CSCS, and it will provide resources as required from the officially acknowledged national Tier-2 centres as part of WLCG. The computing resource requirements of the LHC experiments are collected by the WLCG management; they are monitored and scrutinized by the CERN "Computing Resources Scrutiny Group CRSG", and presented to the CERN Computing Resources Review Board (C-RRB). The data approved by the C-RRB serve as the basis for the funding requests in the various countries, including Switzerland through the present FLARE funding request.According to the C-RRB recommendation, we assume a flat financial budget for this request. Under this assumption we will project our expenditures over the next two years, and present a scheme of average resource growth. The deployment of resources is supervised by the CHIPP Computing Board under the auspices of CHIPP. This board includes representatives from all Swiss particle physics institutes as well as CSCS. All institutes continue to rely on and strongly support the project.
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