Persistent storage of non-event data in the CMS databases

Details Persistent storage of non-event data in the CMS databases Persistent storage of non-event data in the CMS databases

2010-01-11

arxiv.org/abs/1001.1674v2

Physics

Instrumentation and Detectors

20 pages, submitted to JINST

Scientific paper

In the CMS experiment, the non event data needed to set up the detector, or being produced by it, and needed to calibrate the physical responses of the detector itself are stored in ORACLE databases. The large amount of data to be stored, the number of clients involved and the performance requirements make the database system an essential service for the experiment to run. This note describes the CMS condition database architecture, the data-flow and PopCon, the tool built in order to populate the offline databases. Finally, the first experience obtained during the 2008 and 2009 cosmic data taking are presented.

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