ATLAS trigger simulation with legacy code using virtualization techniques

15th International Workshop on Advanced Computing and Analysis Techniques in Physics Research

物理学;计算机科学

Galster, Gorm^1 ; Stelzer, Joerg^2 ; Wiedenmann, Werner^3

University of Copenhagen, Denmark^1

Michigan State University, United States^2

University of Wisconsin, United States^3

关键词: ATLAS experiment;    Contextualization;    Data preservations;    Detector response;    Event reconstruction;    Legacy code;    Proof of concept;    Virtualization Techniques;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/523/1/012031/pdf
DOI  :  10.1088/1742-6596/523/1/012031

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Several scenarios, both present and future, require re-simulation of the trigger response in the ATLAS experiment at the LHC. While software for the detector response simulation and event reconstruction is allowed to change and improve, the trigger response simulation has to reflect the conditions at which data was taken. This poses a maintenance and data preservation problem. Several strategies have been considered and a proof-of-concept model using virtualization has been developed. While the virtualization with CernVM elegantly solves several aspects of the data preservation problem, the limitations of current methods for contextualization of the virtual machine as well as incompatibilities in the currently used data format introduces new challenges. In this proceeding these challenges, their current solutions and the proof of concept model for precise trigger simulation are discussed.