학술논문
ATLAS Sim@P1 upgrades during long shutdown two.
Document Type
Article
Author
Doglioni, C.; Kim, D.; Stewart, G.A.; Silvestris, L.; Jackson, P.; Kamleh, W.; Berghaus, Frank; Brasolin, Franco; Di Girolamo, Alessandro; Ebert, Marcus; Leavett-Brown, Colin Roy; Lee, Chris; Love, Peter; Pozo Astigarraga, Eukeni; Scannicchio, Diana Alessandra; Schovancova, Jaroslava; Seuster, Rolf; Sobie, Randall
Source
Subject
*DATA acquisition systems
*COMPUTER simulation
*ELECTRONIC data processing
*LARGE Hadron Collider
*SOFTWARE upgrades
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Language
ISSN
2101-6275
Abstract
The Simulation at Point1 (Sim@P1) project was built in 2013 to take advantage of the ATLAS Trigger and Data Acquisition High Level Trigger (HLT) farm. The HLT farm provides around 100,000 cores, which are critical to ATLAS during data taking. When ATLAS is not recording data, such as the long shutdowns of the LHC, this large compute resource is used to generate and process simulation data for the experiment. At the beginning of the second long shutdown of the large hadron collider, the HLT farm including the Sim@P1 infrastructure was upgraded. Previous papers emphasised the need for simple, reliable, and efficient tools and assessed various options to quickly switch between data acquisition operation and offline processing. In this contribution, we describe the new mechanisms put in place for the opportunistic exploitation of the HLT farm for offline processing and give the results from the first months of operation. [ABSTRACT FROM AUTHOR]