Status of ALICE T2 Sites in Japan

ATCF9 https://indico.cern.ch/event/1566166/ での発表スライド。

Transcript

1. Introduction Hiroshima Tsukuba & Nagasaki Plans & Summary StatusofALICET2SitesinJapan The 9th Asian Tier Center Forum Center for Computational Sciences, University of Tsukuba, Japan September 26, 2025 Masanori Ogino, on behalf of ALICE Japan Computing Group Center for Nuclear Study, the University of Tokyo 0
2. Introduction Hiroshima Tsukuba & Nagasaki Plans & Summary ALICE Japan Computing Group 1
3. Introduction Hiroshima Tsukuba & Nagasaki Plans & Summary ALICE Japan Computing Group • Quark Physics Laboratory, Hiroshima University ◦ Kenta Shigaki ◦ Satoshi Yano ◦ Takuma Matsumoto (Grad. Student) • High Energy Nuclear Physics Group, University of Tsukuba ◦ Tatsuya Chujo ◦ Sumio Kato • Group for Physics Measurement, Nagasaki Institute of Applied Science ◦ Ken Oyama ◦ Sho Miyamoto (Grad. Student) ◦ Hiroki Osanai (Grad. Student) • Quark Physics Group, Center for Nuclear Study, the University of Tokyo ◦ Masanori Ogino (2021–2024: Hiroshima Univ.) 2
4. Introduction Hiroshima Tsukuba & Nagasaki Plans & Summary Hiroshima Site: Overview • In operation since 2008 • Monte Carlo (ALICE Tier 2) • Both CE & SE installed • 1,280 cores (x86-64) • 1.44 PB (under construction) • AlmaLinux 9 • Modern software stack (HTCondor, EOS, Grafana) 3
5. Introduction Hiroshima Tsukuba & Nagasaki Plans & Summary Hiroshima Site: Networking 4
6. Introduction Hiroshima Tsukuba & Nagasaki Plans & Summary Hiroshima Site: Software Architecture 5
7. Introduction Hiroshima Tsukuba & Nagasaki Plans & Summary Hiroshima Site: Performance 6
8. Introduction Hiroshima Tsukuba & Nagasaki Plans & Summary Hiroshima Site: Performance (cont.) • Expired jobs around July: cleanup problems in JAliEn and HTCondor • Errors around Sept: powercut • ERROR_E (yellow bar) will decrease once EOS up and running • 8-core production jobs (mostly) 7
9. Introduction Hiroshima Tsukuba & Nagasaki Plans & Summary Hiroshima Site: Performance (cont.) 8
10. Introduction Hiroshima Tsukuba & Nagasaki Plans & Summary Hiroshima Site: Monitoring 9
11. Introduction Hiroshima Tsukuba & Nagasaki Plans & Summary Status of Tsukuba Site Starting up new activities! • Initiated a discussion with Prof. Tatebe (and Prof. Fujita) in CCS: potential use of the Pegasus supercomputer for ALICE grid job processing? ◦ See slides by Norihisa @ Day 1 and Latchezar @ Day 2 for details • Considering to start up a small-scale traditional (non-HPC) grid site ◦ Established an agreement with the university to connect SINET via campus network for ALICE ◦ Dedicated network line with switch has been established 10
12. Introduction Hiroshima Tsukuba & Nagasaki Plans & Summary Status of Nagasaki Site Soon-to-be ready for accepting grid jobs! • Small-scale site without SE (may rely on Hiroshima and KISTI) • 336 CPUs (with SMT, mostly AMD Ryzen and EPYC) • VOBox and one WN in progress • Uses VMs for VOBox & Squid, bare metal WNs 11
13. Introduction Hiroshima Tsukuba & Nagasaki Plans & Summary Future Plans Hiroshima Site • Activate 1.44 PB EOS instances • Activate currently-offline 480 cores • Migrate to IPv4 / IPv6 dual stack • Prepare for hardware lease contract renewal in 2027 Tsukuba Site • Work on Pegasus-for-grid-jobs Nagasaki Site • Full production by October • ∼ 500 CPUs by the end of 2026 • 1 Gb/s → 10 Gb/s or 40 Gb/s in 2026 12
14. Introduction Hiroshima Tsukuba & Nagasaki Plans & Summary Summary • Hiroshima CE serves well so far, SE in progress • Preparing for computing resources in coming years • Keen to deploy new technologies (containers, virtual machines, ...) • We hope two more green stars shining in this map! Thank you for your attention! 13