Sep 2 – 9, 2007
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ATLAS Conditions Database Experience with the LCG COOL Conditions Database Project

Sep 3, 2007, 8:00 AM
10h 10m
Victoria, Canada

Victoria, Canada

Board: 28
poster Software components, tools and databases Poster 1


Dr Monica Verducci (European Organization for Nuclear Research (CERN))


One of the most challenging task faced by the LHC experiments will be the storage of "non-event data" produced by calibration and alignment stream processes into the Conditions Database. For the handling of this complex experiment conditions data the LCG Conditions Database Project has implemented COOL, a new software product designed to minimise the duplication of effort by developing a single implementation to support persistency for several relational technologies (Oracle,MySQL and SQLite). After several production releases of the COOL software, the project has be moved into the deployment phase in Atlas and LHCb, the two experiments that are developing the software in collaboration with CERN IT. In particular, the ATLAS Conditions Database, accessed by the offline reconstruction framework (ATHENA), is implemented using this COOL technology. The objects, stored or referenced in the COOL tables, have an associated start and end time (run or event number or absolute time-stamp) between they are valid (Interval of Validity). The storage and retrieving of data during a recontruction job inside ATHENA is guaranteed by the IOVService, a software interface between the COOL DB and the reconstruction algorithms. This work describes some practical examples already successfully tested in ATLAS and the further extensively tests of the entire chain foreseen during the next Computing and Detector Commissioning in 2007.
Submitted on behalf of Collaboration (ex, BaBar, ATLAS) ATLAS

Primary author

Dr Monica Verducci (European Organization for Nuclear Research (CERN))

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