1,243 research outputs found
GSDC: A Unique Data Center in Korea for HEP research
No full textGlobal Science experimental Data hub Center (GSDC) at Korea Institute of Science and Technology Information (KISTI) is a unique data center in South Korea established for promoting the fundamental research fields by supporting them with the expertise on Information and Communication Technology (ICT) and the infrastructure for High Performance Computing (HPC), High Throughput Computing (HTC) and Networking. GSDC has supported various research fields in South Korea dealing with the large scale of data, e.g. RENO experiment for neutrino research, LIGO experiment for gravitational wave detection, Genome sequencing project for bio-medical, and HEP experiments such as CDF at FNAL, Belle at KEK, and STAR at BNL. In particular, GSDC has run a Tier-1 center for ALICE experiment using the LHC at CERN since 2013. In this talk, we present the overview on computing infrastructure that GSDC runs for the research fields and we discuss on the data center infrastructure management system deployed at GSDC
EOS 2024 Workshop
No full textWe have been running disk and archive (replacing tape) storage for ALICE experiment with EOS for several years. In 2023, we upgraded our EOS instances to v5 from v4. More recently we deployed EOS based on Podman (instead of Docker), which is adapted as a native container runtime in EL9 distributions. In this work, we present the current status of EOS operation at KISTI Tier-1 centre based on Podman container with systemd integration
EOS 2023 Workshop
No full textWe present the current operation status of CDS (the Disk-based Custodial Storage) for ALICE experiment. The CDS is based on EOS Erasure Coding implementation with four parity mode to match with Tape based archival storage in terms of data protection. We will discuss briefly the plan of CDS operation automation for hardware intervention, especially the disk replacement, and of its expansion to meet the upcoming pledges. Also we will discuss the cost analysis of CDS for long-term basis
25th International Conference on Computing in High Energy & Nuclear Physics
No full textWe proposed a disk-based custodial storage as an alternative to tape for the ALICE experiment at CERN to preserve its raw data.
The proposed storage system relies on RAIN layout -- the implementation of erasure coding in the EOS storage suite, which is developed by CERN -- for data protection and takes full advantage of high-density JBOD enclosures to maximize storage capacity as well as to achieve cost-effectiveness comparable to tape.
The system we present provides 18 PB of total raw capacity from the 18 set of high-density JBOD enclosures attached to 9 EOS front-end servers.
In order to balance between usable space and data protection, the system will stripe a file into 16 chunks on the 4-parity enabled RAIN layout configured on top of 18 containerized EOS FSTs.
Although the reduction rate of available space increases up to with this layout, the estimated annual data loss rate drops down to .
In this paper, we discuss the system architecture of the disk-based custodial storage, 4-parity RAIN layout, deployment automation, and the integration to the ALICE experiment in detail
Analyse de la production de Upsilon dans les collisions pp à 7 TeV avec le spectromètre à muons de l'expérience ALICE
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EOS workshop
No full textThis is going to be a brief presentation regarding the operation status of Custodial Disk Storage (CDS) system provided for the ALICE experiment as a Tape. The CDS system is basically using EOS with its erasure coding implementation (RAIN) for the data protection. The CDS joined the WLCG Tape Challenges in the previous year and about a PB of data has been transferred from the experiment. A short reminder of system architecture and EOS RAIN configuration will be presented followed by operational activities and future plans
EOS workshop
No full textWe present a disk-based custodial storage for the ALICE experiment at CERN to preserve its raw data alternative to tape with the EOS QRAIN. In this presentation, we describe the detailed system deployment of disk-based custodial storage, the integration to the ALICE experiment and the current status of system monitoring such as hardware error detection and power consumption measurement
Analysis of Upsilon production in pp collisions at 7 TeV with the ALICE Muon Spectrometer
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