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Offline calibration framework – update

Offline calibration framework – update . Offline Weekly Meeting – 29 May 2009 C. Cheshkov & C . Zampolli. Calibration Step – 1 . Chunk 0. Chunk 1. . Chunk i. Chunk i+1. Chunk i+2. . Reconstruction (inside the event loop) Calibration/Alignment AliAnalysisTasks.

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Offline calibration framework – update

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  1. Offline calibration framework – update Offline Weekly Meeting – 29 May 2009 C. Cheshkov & C. Zampolli

  2. Calibration Step – 1 Chunk 0 Chunk 1 ... Chunk i Chunk i+1 Chunk i+2 ... Reconstruction (inside the event loop) Calibration/Alignment AliAnalysisTasks Not necessarily AliAnalysisTasks, but useful like this (it can be run on files) Step 1 ESDFriends i ESD 0 ITS TRD ... Objects that scale with the n. of events! (branches of the tree for ESD friends) C. Cheshkov & C. Zampolli

  3. Calibration Step – 2 Chunk 0 Chunk 1 ... Chunk i Chunk i+1 Chunk i+2 ... reconstruction Step 2 ESD i ESD-Friends i Calibration/Alignment train of AliAnalysisTasks ... TRD ITS ESD Friends i ITS TRD ... Objects that do not scale with the n. of events! N.B.: the wagons are the different tasks! C. Cheshkov & C. Zampolli

  4. Proposal for an Update of the Current Schema • All detector except SSD, T0, Alignment do not really need step 1 • Everything which should be done in step 1 could be moved to step 2 • Proposal: • Remove step 1 Leave the reconstruction untouched • Modify step 2: • Using the Analysis Framework with several tasks (Calib/Align) having the same output file • Filtering of ESDFriends • Overwriting of the AliESDFriends file obtained from the reconstruction  on the Worker Node • Filtered friends • Objects in separte folders produced for calibration C. Cheshkov & C. Zampolli

  5. Calibration Step – 2 – Update For chunk i.... ESD-Friends i ESD i • Calibration/Alignment train of AliAnalysisTasks • Common Input: ESDs + ESDFriends • - Common Output: ESDs1 + ESDFriends1 • AliESDs: Copying the content of the AliESD • AliESDFriend: Creating new emptyones filled by the Tasks • new objectto be stored in the ESDFriends file • - Removing ESD1 • - Moving ESDFriend1 into ESDFriends  Overwriting filtered! ESD i ESD-Friends i ITS TRD ... C. Cheshkov & C. Zampolli

  6. Discussion C. Cheshkov & C. Zampolli

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