Number of the records: 1
Understanding the evolution of conditions data access through Frontier for the ATLAS Experiment
- 1.
SYSNO ASEP 0522514 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Understanding the evolution of conditions data access through Frontier for the ATLAS Experiment Author(s) Svatoš, Michal (FZU-D) RID, ORCID
De Salvo, A. (IT)
Dewhurst, A. (GB)
Vamvakopoulos, E. (FR)
Bahilo Lozano, J. (CH)
Ozturk, N. (US)
Sánchez, J. (ES)
Dykstra, D. (US)Number of authors 8 Article number 03020 Source Title EPJ Web of Conferences, 214. - les Ulis : EDP Sciences, 2019 / Forti A. ; Betev L. ; Litmaath M. ; Smirnova O. ; Hristov P. - ISSN 2100-014X Pages s. 1-8 Number of pages 8 s. Publication form Online - E Action International Conference on Computing in High Energy and Nuclear Physics (CHEP 2018) /23./ Event date 09.07.2018 - 13.07.2018 VEvent location Sofia Country BG - Bulgaria Event type WRD Language eng - English Country FR - France Keywords ATLAS ; LHC Run 2 ; Squid ; experiment Subject RIV JD - Computer Applications, Robotics OECD category Automation and control systems R&D Projects LM2015058 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF16_013/0001404 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support FZU-D - RVO:68378271 DOI 10.1051/epjconf/201921403020 Annotation All ATLAS computing sites use Squid web proxies to cache the data, greatly reducing the load on the Frontier servers and the databases. One feature of the Frontier client is that in the event of failure, it retries with different services. While this allows transient errors and scheduled maintenance to happen transparently, it does open the system up to cascading failures if the load is high enough. Throughout LHC Run 2 there has been an ever increasing demand on the Frontier service. There have been multiple incidents where parts of the service failed due to high load. A significant improvement in the monitoring of the Frontier service was required. The monitoring was needed to identify both problematic tasks, which could then be killed or throttled, and to identify failing site services as the consequence of a cascading failure is much higher. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2020
Number of the records: 1