| Issue |
EPJ Web Conf.
Volume 214, 2019
23rd International Conference on Computing in High Energy and Nuclear Physics (CHEP 2018)
|
|
|---|---|---|
| Article Number | 01001 | |
| Number of page(s) | 8 | |
| Section | T1 - Online computing | |
| DOI | https://doi.org/10.1051/epjconf/201921401001 | |
| Published online | 17 September 2019 | |
https://doi.org/10.1051/epjconf/201921401001
Simultaneous usage of the LHCb HLT farm for Online and Offline processing workflows
CERN, European Organization for Nuclear Research, Geneva, Switzerland
* Joel Closier: joel.closier@cern.ch
** Luis Granado Cardoso: luis.granado@cern.ch
*** Christophe Haen: christophe.haen@cern.ch
Published online: 17 September 2019
LHCb is one of the 4 LHC experiments and continues to revolutionise data acquisition and analysis techniques. Already two years ago the concepts of “online” and “offline” analysis were unified: the calibration and alignment processes take place automatically in real time and are used in the triggering process such that Online data are immediately available offline for physics analysis (Turbo analysis), the computing capacity of the HLT farm has been used simultaneously for different workflows : synchronous first level trigger, asynchronous second level trigger, and Monte-Carlo simulation. Thanks to the same software environment, LHCb can switch seamlessly and fast from Online to Offline workflows, run them simultaneously and thus maximize the usage of the HLT farm computing resources.
© The Authors, published by EDP Sciences, 2019
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