Online data handling and storage at the CMS experiment

André, Jean‐Marc; Andronidis, Anastasios; Behrens, U.; Branson, J. G.; Chaze, Olivier; Cittolin, S.; Darlea, Georgiana-Lavinia; Deldicque, Christian; Demiragli, Z.; Dobson, M.; Dupont, Aymeric; Erhan, S.; Gigi, D.; Glege, F.; Gómez-Ceballos, G.; Hegeman, J.; Holzner, A.; Jimenez-Estupiñán, R.; Masetti, L.; Meijers, F.; Meschi, E.; Mommsen, R. K.; Morovic, S.; Nunez-Barranco-Fernandez, Carlos; O’Dell, V.; Orsini, L.; Paus, C.; Petrucci, Andrea; Pieri, M.; Rácz, A.; Roberts, P.; Sakulin, H.; Schwick, C.; Stieger, B.; Sumorok, K.; Veverka, J.; Zaza, S.; Zejdl, Petr

doi:10.1088/1742-6596/664/8/082009

Cited by 5 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For Run 2, Lustre [268] was selected as the cluster file system, after initial evaluation in the DAQ integration system. The production system consisted of two disk servers (OSS) and a metadata server (MDS), providing on the order of 9 GB/s of total read and write throughput, with around 500 TB of storage space provided by a redundant hard drive setup.…”

Section: Storage and Transfer Systemmentioning

confidence: 99%

Development of the CMS detector for the CERN LHC Run 3

Hayrapetyan,

Tumasyan,

Adam

et al. 2024

J. Inst.

View full text Add to dashboard Cite

Since the initial data taking of the CERN LHC, the CMS experiment has undergone substantial upgrades and improvements. This paper discusses the CMS detector as it is configured for the third data-taking period of the CERN LHC, Run 3, which started in 2022. The entire silicon pixel tracking detector was replaced. A new powering system for the superconducting solenoid was installed. The electronics of the hadron calorimeter was upgraded. All the muon electronic systems were upgraded, and new muon detector stations were added, including a gas electron multiplier detector. The precision proton spectrometer was upgraded. The dedicated luminosity detectors and the beam loss monitor were refurbished. Substantial improvements to the trigger, data acquisition, software, and computing systems were also implemented, including a new hybrid CPU/GPU farm for the high-level trigger.

show abstract

Section: Storage and Transfer Systemmentioning

confidence: 99%

Development of the CMS detector for the CERN LHC Run 3

Hayrapetyan,

Tumasyan,

Adam

et al. 2024

J. Inst.

View full text Add to dashboard Cite

show abstract

“…At the CMS experiment [6], the Storage and Transfer System was in charge of moving the data to tape storage. The storage system was based on Lustre cluster file system [7], which was capable of delivering an aggregated throughput of 7 GB/s [8]. For Run 3, the same system will be replaced by a more powerful similar one, which will likely meet 31-61 GB/s throughput and a total storage of 2-4 PB [9].…”

Section: The Storage Systems For Data Acquisition In High Energy Physicsmentioning

confidence: 99%

The LHCb HLT2 Storage System: A 40-GB/s System Made of Commercial Off-the-Shelf Components and Open-Source Software

Cifra

Sborzacchi

Neufeld

et al. 2023

IEEE Trans. Nucl. Sci.

View full text Add to dashboard Cite

The LHCb (Large Hadron Collider beauty) experiment is designed to study differences between particles and anti-particles as well as very rare decays in the charm and beauty sector of the standard model at the LHC. With the major upgrade done in view of Run 3, the detector will read-out all events at the full LHC bunch-crossing frequency of 40 MHz. The LHCb data acquisition system will be subject to a considerably increased data rate, reaching a peak of 40 Tb/s. The second stage of the two-stage filtering consists of more than 10000 multithreaded processes which simultaneously write output files at an aggregated band-width of 100 Gb/s. At the same time, a small number of file-moving processes will read files from the same storage to copy them over to tape-storage. This whole mechanism must run reliably over months and be able to cope with significant fluctuations. Moreover, for cost reasons, it must be built from off-the-shelf components. In this paper we describe LHCb's solution to this challenge. We show the design, present reasons for the design choices, the configuration and tuning of the adopted software solution, and present performance figures.

show abstract

“…There, however, will always be exceptions. In the cases of experiments like ATLAS and CMS, the data rates are beyond what exists elsewhere in the world at 20+ TB/day [69]. Clearly, for such situations, dedicated, specialized systems will likely need to be designed and maintained locally.…”

Section: Future Technologiesmentioning

confidence: 99%

Nuclear Dependence of Proton-Induced Drell-Yan Dimuon Production at 120 GeV at Seaquest

Dannowitz¹

2016

View full text Add to dashboard Cite

This dissertation has manifested itself as the grand sum of the support that I've received from the colleagues, friends, and family in my life. First and foremost of them all, I give my thanks to my parents, Judy and Robert, who have never wavered in encouraging and supporting me in every way possible as I bounded through this long journey across many states, schools, jobs, and countries.My sincere gratitude goes to my advisor and mentor, Naomi Makins, who first drew me to the University of Illinois and SeaQuest by her enthusiasm and fervor alone. Anything insightful that I may present or

show abstract

Online data handling and storage at the CMS experiment

Cited by 5 publications

References 0 publications

Development of the CMS detector for the CERN LHC Run 3

Development of the CMS detector for the CERN LHC Run 3

The LHCb HLT2 Storage System: A 40-GB/s System Made of Commercial Off-the-Shelf Components and Open-Source Software

Nuclear Dependence of Proton-Induced Drell-Yan Dimuon Production at 120 GeV at Seaquest

Contact Info

Product

Resources

About