Caching technologies for Tier-2 sites: A UK perspective

Skipsey, Samuel Cadellin; Brew, Chris; Forti, Alessandra; Traynor, Dan; Li, Teng; Boutcher, Adam; Roy, Gareth; Stewart, Gordon; Britton, David

Abstract

Pressures from both WLCG VOs and externalities have led to a desire to "simplify" data access and handling for Tier-2 resources across the Grid. This has mostly been imagined in terms of reducing book-keeping for VOs, and total replicas needed across sites. One common direction of motion is to increasing the amount of remote-access to data for jobs, which is also seen as enabling the development of administratively-cheaper Tier-2 subcat-egories, reducing manpower and equipment costs. Caching technologies are often seen as a "cheap" way to ameliorate the increased latency (and decreased bandwidth) introduced by ubiquitous remote-access approaches, but the usefulness of caches is strongly dependant on the reuse of the data thus cached. We report on work done in the UK at four GridPP Tier-2 sites - ECDF, Glasgow, RALPP and Durham - to investigate the suitability of transparent caching via the recently-rebranded XCache (Xrootd Proxy Cache) for both ATLAS and CMS workloads, and to support workloads by other caching approaches (such as the ARC CE Cache).

Citation

Skipsey, S. C., Brew, C., Forti, A., Traynor, D., Li, T., Boutcher, A., Roy, G., Stewart, G., & Britton, D. (2018, July). Caching technologies for Tier-2 sites: A UK perspective. Presented at 23rd International Conference on Computing in High Energy and Nuclear Physics (CHEP 2018), Sofia, Bulgaria

• Presentation Conference Type: Conference Paper (published)
• Conference Name: 23rd International Conference on Computing in High Energy and Nuclear Physics (CHEP 2018)
• Start Date: Jul 9, 2018
• End Date: Jul 13, 2018
• Online Publication Date: Sep 17, 2019
• Publication Date: 2019
• Deposit Date: Jul 12, 2024
• Journal: EPJ Web of Conferences
• Electronic ISSN: 2100-014X
• Publisher: Società Italiana di Fisica
• Peer Reviewed: Not Peer Reviewed
• Volume: 214
• Article Number: 04002
• DOI: https://doi.org/10.1051/epjconf/201921404002
• Public URL: https://durham-repository.worktribe.com/output/2525553