| ATLAS Slides | |
| Report number | ATL-SOFT-SLIDE-2018-409 |
| Title | Advances in ATLAS@Home towards a major ATLAS computing resource |
| Author(s) | Cameron, David (University of Oslo) ; Wu, Wenjing (Institute of High Energy Physics, Chinese Academy of Sciences) ; Bogdanchikov, Alexander (Budker Institute of Nuclear Physics, Siberian Branch of Russian Academy of Sciences) ; Bianchi, Riccardo-Maria (University of Pittsburgh) |
| Corporate author(s) | The ATLAS collaboration |
| Collaboration | ATLAS Collaboration |
| Submitted to | 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018 |
| Submitted by | [email protected] on 26 Jun 2018 |
| Subject category | Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN LHC ; ATLAS |
| Abstract | The volunteer computing project ATLAS@Home has been providing a stable computing resource for the ATLAS experiment since 2013. It has recently undergone some significant developments and as a result has become one of the largest resources contributing to ATLAS computing, by expanding its scope beyond traditional volunteers and into exploitation of idle computing power in ATLAS data centres. Removing the need for virtualization on Linux and instead using container technology has made the entry barrier significantly lower data centre participation and in this paper, we describe the implementation and results of this change. We also present other recent changes and improvements in the project. In early 2017 the ATLAS@Home project was merged into a combined LHC@Home platform, providing a unified gateway to all CERN-related volunteer computing projects. The ATLAS Event Service shifts data processing from file-level to event-level and we describe how ATLAS@Home was incorporated into this new paradigm. The finishing time of long tasks was also greatly improved by implementing a reassignment scheduling algorithm to assign late jobs to “reliable” volunteer hosts. Finally, the steps taken to allow regular ATLAS grid sites to move completely to ATLAS@Home are shown. |
| Related document | Conference Paper ATL-SOFT-PROC-2018-032 |
Zapis kreiran 2018-06-26, zadnja izmjena 2022-09-12
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