Setting up a STAR Tier 2 Site at Golias/Prague Farm
Petr Chaloupka, Pavel Jakl, Jan Kapit\'an, J\'er\^ome Lauret and, Michal Zerola

TL;DR
This paper describes the setup and implementation of a local Tier 2 computing center at Golias for the STAR experiment, enhancing data processing efficiency and analysis capabilities for the Prague heavy-ions group.
Contribution
It presents a comprehensive case study of establishing a functional Tier 2 site, including solutions for storage, analysis, and data transfer, tailored to local infrastructure constraints.
Findings
Improved data access and analysis efficiency at Golias.
Successful integration of local analysis framework with storage system.
Automated data transfer tools enhanced dataset movement from Tier 0 to Tier 2.
Abstract
High Energy Nuclear Physics (HENP) collaborations' experience show that the computing resources available at a single site are often neither sufficient nor satisfy the need of remote collaborators. From latencies in the network connectivity to the lack of interactivity, work at distant computing centers is often inefficient. Having fully functional software stack on local resources is a strong enabler of science opportunities for any local group who can afford the time investment. Prague's heavy-ions group participating in STAR experiment at RHIC has been a strong advocate of local computing as the most efficient means of data processing and physics analyses. Tier 2 computing center was set up at a Regional Computing Center for Particle Physics called "Golias". We report on our experience in setting up a fully functional Tier 2 center and discuss the solutions chosen to address…
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