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View article: Analysis Facilities for the HL-LHC White Paper
Analysis Facilities for the HL-LHC White Paper Open
This white paper presents the current status of the R&D for Analysis Facilities (AFs) and attempts to summarize the views on the future direction of these facilities. These views have been collected through the High Energy Physics (HEP) So…
View article: Operational experience from the Spanish CMS Analysis Facility at CIEMAT
Operational experience from the Spanish CMS Analysis Facility at CIEMAT Open
The anticipated surge in data volumes generated by the LHC in the coming years, especially during the High-Luminosity LHC phase, will reshape how physicists conduct their analysis. This necessitates a shift in programming paradigms and tec…
View article: Commissioning and exploitation of the MareNostrum5 cluster at the Barcelona Supercomputing Center for CMS computing
Commissioning and exploitation of the MareNostrum5 cluster at the Barcelona Supercomputing Center for CMS computing Open
The MareNostrum 5 (MN5) is the newly deployed pre-exascale EuroHPC supercomputer hosted at the Barcelona Supercomputing Center (BSC) in Spain. Its 750,000-core general-purpose CPU cluster offers new opportunities for CMS data processing an…
Comparative analysis of Machine Learning-based eviction techniques and LRU mechanisms for CMS data caching Open
The Large Hadron Collider (LHC) at CERN in Geneva is preparing for a major upgrade that will improve both its accelerator and particle detectors. This strategic move comes in anticipation of a tenfold increase in proton-proton collisions, …
View article: Computing activities at the Spanish Tier-1 & Tier-2s for the ATLAS Experiment in the LHC Run-3 period and towards High Luminosity
Computing activities at the Spanish Tier-1 & Tier-2s for the ATLAS Experiment in the LHC Run-3 period and towards High Luminosity Open
This contribution showcases the Spanish Tier-1 and Tier-2s’ contribution to the computing of the ATLAS experiment at the LHC during the Run-3 period. The Tier-1 and Tier-2 Grid infrastructures, encompassing data storage, processing, and in…
Towards an IPv6-only WLCG: More successes in reducing IPv4 Open
The Worldwide Large Hadron Collider Computing Grid (WLCG) community’s deployment of dual-stack IPv6/IPv4 on its worldwide storage infrastructure has been very successful. Dual-stack is not, however, a viable longterm solution; the HEPiX IP…
Content delivery network solutions for the CMS experiment: The evolution towards HL-LHC Open
El Gran Col·lisionador d'Hadrons (LHC) al CERN de Ginebra està preparat per a una actualització transformadora, preparant-se per millorar tant el seu accelerador com els detectors de partícules. Aquesta iniciativa estratègica està impulsad…
Content Delivery Network solutions for the CMS experiment: the evolution towards HL-LHC Open
The Large Hadron Collider (LHC) at CERN in Geneva is undergoing a significant upgrade in anticipation of a tenfold increase in proton-proton collisions expected in its forthcoming high-luminosity phase, starting by 2029. This necessitates …
View article: Analysis Facilities White Paper
Analysis Facilities White Paper Open
This white paper presents the current status of the R&D for Analysis Facilities (AFs) and attempts to summarize the views on the future direction of these facilities. These views have been collected through the High Energy Physics (HEP) So…
View article: Computing Activities at the Spanish Tier-1 and Tier-2s for the ATLAS experiment in the LHC Run 3 period and towards High Luminosity (HL-LHC)
Computing Activities at the Spanish Tier-1 and Tier-2s for the ATLAS experiment in the LHC Run 3 period and towards High Luminosity (HL-LHC) Open
The ATLAS Spanish Tier-1 and Tier-2s have more than 18 years of experience in the deployment and development of LHC computing components and their successful operation. The sites are actively participating in, and in some cases coordinatin…
View article: A case study of content delivery networks for the CMS ex-periment
A case study of content delivery networks for the CMS ex-periment Open
In 2029 the LHC will start the high-luminosity LHC program, with a boost in the integrated luminosity resulting in an unprecedented amount of ex- perimental and simulated data samples to be transferred, processed and stored in disk and tap…
View article: Integration of the Barcelona Supercomputing Center for CMS computing: Towards large scale production
Integration of the Barcelona Supercomputing Center for CMS computing: Towards large scale production Open
The CMS experiment is working to integrate an increasing number of High Performance Computing (HPC) resources into its distributed computing infrastructure. The case of the Barcelona Supercomputing Center (BSC) is particularly challenging …
View article: The Spanish CMS Analysis Facility at CIEMAT
The Spanish CMS Analysis Facility at CIEMAT Open
The increasingly larger data volumes that the LHC experiments will accumulate in the coming years, especially in the High-Luminosity LHC era, call for a paradigm shift in the way experimental datasets are accessed and analyzed. The current…
Overcoming obstacles to IPv6 on WLCG Open
The transition of the Worldwide Large Hadron Collider Computing Grid (WLCG) storage services to dual-stack IPv6/IPv4 is almost complete; all Tier-1 and 94% of Tier-2 storage are IPv6 enabled. While most data transfers now use IPv6, a signi…
New storage and data access solution for CMS experiment in Spain towards HL-LHC era Open
The Large Hadron Collider (LHC) will enter a new era for data acquisition by 2029 within the High-Luminosity Large Hadron Collider (HL-LHC) program, where the LHC will raise the proton and ion collisions up to unprecedented levels. This in…
View article: Extending the distributed computing infrastructure of the CMS experiment with HPC resources
Extending the distributed computing infrastructure of the CMS experiment with HPC resources Open
Particle accelerators are an important tool to study the fundamental properties of elementary particles. Currently the highest energy accelerator is the LHC at CERN, in Geneva, Switzerland. Each of its four major detectors, such as the CMS…
View article: HSF IRIS-HEP Second Analysis Ecosystem Workshop Report
HSF IRIS-HEP Second Analysis Ecosystem Workshop Report Open
The second workshop on the HEP Analysis Ecosystem took place 23-25 May 2022 at IJCLab in Orsay, to look at progress and continuing challenges in scaling up HEP analysis to meet the needs of HL-LHC and DUNE, as well as the very pressing nee…
View article: HSF IRIS-HEP Second Analysis Ecosystem Workshop Report
HSF IRIS-HEP Second Analysis Ecosystem Workshop Report Open
The second workshop on the HEP Analysis Ecosystem took place 23-25 May 2022 at IJCLab in Orsay, to look at progress and continuing challenges in scaling up HEP analysis to meet the needs of HL-LHC and DUNE, as well as the very pressing nee…
View article: Exploitation of network-segregated CPU resources in CMS
Exploitation of network-segregated CPU resources in CMS Open
CMS is tackling the exploitation of CPU resources at HPC centers where compute nodes do not have network connectivity to the Internet. Pilot agents and payload jobs need to interact with external services from the compute nodes: access to …
View article: Lightweight site federation for CMS support
Lightweight site federation for CMS support Open
There is a general trend in WLCG towards the federation of resources, aiming for increased simplicity, efficiency, flexibility, and availability. Although general VO-agnostic federation of resources between two independent and autonomous r…
View article: CMS data access and usage studies at PIC Tier-1 and CIEMAT Tier-2
CMS data access and usage studies at PIC Tier-1 and CIEMAT Tier-2 Open
The current computing models from LHC experiments indicate that much larger resource increases would be required by the HL-LHC era (2026+) than those that technology evolution at a constant budget could bring. Since worldwide budget for co…
View article: Exploiting network restricted compute resources with HTCondor: a CMS experiment experience
Exploiting network restricted compute resources with HTCondor: a CMS experiment experience Open
In view of the increasing computing needs for the HL-LHC era, the LHC experiments are exploring new ways to access, integrate and use non-Grid compute resources. Accessing and making efficient use of Cloud and High Performance Computing (H…
View article: New developments in cost modeling for the LHC computing
New developments in cost modeling for the LHC computing Open
The increase in the scale of LHC computing during Run 3 and Run 4 (HL-LHC) will certainly require radical changes to the computing models and the data processing of the LHC experiments. The working group established by WLCG and the HEP Sof…
View article: Computing activities at the Spanish Tier-1 and Tier-2s for the ATLAS experiment towards the LHC Run3 and High-Luminosity periods
Computing activities at the Spanish Tier-1 and Tier-2s for the ATLAS experiment towards the LHC Run3 and High-Luminosity periods Open
The ATLAS Spanish Tier-1 and Tier-2s have more than 15 years of experience in the deployment and development of LHC computing components and their successful operations. The sites are already actively participating in, and even coordinatin…
View article: Spanish ATLAS Tier-1 & Tier-2 perspective on computing over the next years
Spanish ATLAS Tier-1 & Tier-2 perspective on computing over the next years Open
Since the beginning of the WLCG Project the Spanish ATLAS computing centers have participated with reliable and stable resources as well as personnel for the ATLAS Collaboration. Our contribution to the ATLAS Tier2s and Tier1s computing re…
View article: System Performance and Cost Modelling in LHC computing
System Performance and Cost Modelling in LHC computing Open
The increase in the scale of LHC computing expected for Run 3 and even more so for Run 4 (HL-LHC) over the next ten years will certainly require radical changes to the computing models and the data processing of the LHC experiments. Transl…
View article: The LHC Tier-1 at PIC: ten years of operations
The LHC Tier-1 at PIC: ten years of operations Open
This paper summarizes ten years of operational experience of the WLCG Tier-1 computer centre at Port d’Informació Científica (PIC), which serves the ATLAS, CMS and LHCb experiments. The centre, located in Barcelona (Spain), has supported a…
Consolidating WLCG topology and configuration in the Computing Resource Information Catalogue Open
The Worldwide LHC Computing Grid infrastructure links about 200 participating computing centres affiliated with several partner projects. It is built by integrating heterogeneous computer and storage resources in diverse data centres all o…