| Issue |
EPJ Web Conf.
Volume 337, 2025
27th International Conference on Computing in High Energy and Nuclear Physics (CHEP 2024)
|
|
|---|---|---|
| Article Number | 01002 | |
| Number of page(s) | 9 | |
| DOI | https://doi.org/10.1051/epjconf/202533701002 | |
| Published online | 07 October 2025 | |
https://doi.org/10.1051/epjconf/202533701002
Evolution of the CERN Tape Archive Scheduling System
CERN, Esplanade des Particules 1, 1211 Geneva 23, Switzerland
* e-mail: jaroslav.guenther@cern.ch
Published online: 7 October 2025
The CERN Tape Archive (CTA) scheduling system implements the workflow and lifecycle of archive, retrieve and repack requests. The transient metadata for queued requests is stored in the Scheduler backend store (Scheduler DB). In our previous work, we presented the CTA Scheduler together with an object-store backend implementation of the Scheduler DB. Now, with four years of experience in production, the strengths and limitations of this approach are better understood. While highly efficient for FIFO queueing operations (archive/retrieve), non-FIFO operations (delete, priority queues) require some workarounds. Additionally, this backend imposes constraints on how the CTA Scheduler code can be modified and is an additional software dependency and technology for developers to learn. This paper discusses an alternative Scheduler DB implementation, based on relational database technology. We include a status report and roadmap.
© The Authors, published by EDP Sciences, 2025
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