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ALICE analysis framework

This document provides an in-depth guide to the ALICE analysis framework, detailing various tools and processes used for analyzing simulated data. It covers user-defined selection criteria, event tagging systems, and how to create local AliEn processes. Key components like AliAnalysisDataContainer, AliAnalysisTask, and AliAnalysisManager are explained, alongside their roles in the analysis flow. This reference is essential for users looking to implement efficient data processing strategies within the ALICE framework, including useful links and resources for further understanding.

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ALICE analysis framework

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  1. ALICE analysis framework References for Analysis Tools used to the ALICE simulated data

  2. Tag xml collection User's macro Selection criteria Query the Event Tag System Extract an esd xml collection Create an esdTree chain Local AliEn Process chain with a manager PROOF AliRoot Analysis Framework Flow of the analysis procedure Query the file catalog

  3. AliAnalysisDataContainer: • Class that allows the user to define the basic input/output containers. • Three types of containers: input, transient and output. • AliAnalysisTask: (see CORRAN/reco/AliCORRANTask.cxx) • Implementation of the actual analysis code that processes input data. • AliAnalysisManager: • Definition of all data containers that will assembly the analysis. • Definition of tasks. • Definition of the relationships between the tasks and the containers. Andrei Gheata http://indico.cern.ch/materialDisplay.py?contribId=19&sessionId=3&materialId=slides&confId=a056304

  4. ALICE Analysis References I • Registration – Certificates: • http://alien.cern.ch/twiki/bin/view/Alice/UserRegistration • https://ca.cern.ch/ca/ • AliEn: • http://alien.cern.ch • Gshell: • http://alien.cern.ch/twiki/bin/view/AliEn/GAPI • User's guide: • http://project-arda-dev.web.cern.ch/project-arda-dev/alice/apiservice/AA-UserGuide-0.0m.pdf

  5. ALICE Analysis References II • aliensh Grid Command Online Reference V1.0 • http://project-arda-dev.web.cern.ch/project-arda-dev/alice/apiservice/guide/guide-1.0.htm • Previous tutorials: • http://aliceinfo.cern.ch/Offline/Analysis/Tutorial/ • Event Tag System: • http://aliceinfo.cern.ch/Offline/Analysis/RunEventTagSystem/ • https://edms.cern.ch/document/788315/1 (INTERNAL NOTE)

  6. ALICE Analysis References III • File catalog structure – Queries: • http://pcaliweb02.cern.ch/Offline/Analysis/RunEventTagSystem/RunTags.html#Run/File%20metadata • File level metadata: • http://cern.ch/Oldenburg/MetaData/MetaData.doc • Analysis framework • http://indico.cern.ch/materialDisplay.py?contribId=19&sessionId=3&materialId=slides&confId=a056304

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