SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 62: DAQ NN/ML – GRID II

T 62.4: Vortrag

Mittwoch, 22. März 2023, 16:35–16:50, HSZ/0301

APEL accounting with AUDITOR — Michael Böhler, Stefan Kroboth, •Dirk Sammel, and Markus Schumacher — Albert-Ludwigs-Universität Freiburg

Institutions that are part of the Worldwide LHC Computing Grid (WLCG) offer computing resources to analyse the data recorded by experiments at the Large Hadron Collider (LHC), and to produce simulated samples. An important task is the accounting of the utilized resources. For this, the used CPU time among other information is reported to the APEL (Accounting Processor for Event Logs) server, which publishes it on the Accounting Portal of the European Grid Infrastructure (EGI).
In Freiburg, for example, the accounting to APEL is performed by ARC CE (Advanced Resource Connector Compute Element). The compute element accepts compute jobs from WLCG and submits them to the local batch system. In addition it can also report the utilized resources. An alternative approach, independent from ARC CE, is the use of AUDITOR (Accounting Data Handling Toolbox For Opportunistic Resources). AUDITOR uses a “collector” to gather job information from the local batch system. These “job records” are stored in a PostgreSQL database, which can be accessed by plug-ins.
This talk first gives a short overview of the accounting system of the ARC software, and then presents an AUDITOR plug-in for accounting to APEL. The plug-in receives job records from the AUDITOR database, formats them according to APEL specifications, and submits them to the APEL server.