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The MEG Offline Project

The MEG Offline Project. General Architecture Offline Organization Responsibilities Milestones. Corrado Gatto INFN. PSI 2/7/2004. Estimated Event Size and Storage. Scaling BABAR & KLOE by multiplicity. Sizes Raw data 1.2 MB/event ESD 10 KB/event

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The MEG Offline Project

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  1. The MEG Offline Project General Architecture Offline Organization Responsibilities Milestones Corrado Gatto INFN PSI 2/7/2004

  2. Estimated Event Size and Storage Scaling BABAR & KLOE by multiplicity Sizes • Raw data 1.2 MB/event • ESD 10 KB/event • AOD 2 KB/event • TAG or DPD 1 KB/event Storage • Raw data 35 TByte • Reconstructed data 13 TByte • MC generated events 40 TByte • MC reconstructed events 25 TByte Assuming 109 generated MC events DST

  3. General Architecture: Guidelines • Computing & data model: MONARC • Completely based on ROOT • Ensure high level of modularity (for easy of maintenance) • Absence of code dependencies between different detector modules (to C++ header problems) • The structure of every detector package is designed so that static parameters (like geometry and detector response parameters) are stored in distinct objects • The data structure is build up as ROOT TTree-objects (Folders)

  4. Data Access: ROOT + RDBMS Model ROOT files Oracle MySQL Calibrations Event Store histograms Run/File Catalog Trees Geometries

  5. Offline Tasks • Offline Framework: • ROOT Installation and Maintenance • Main program Implementation • Container Classes • Control Room User Interface (Run control, DQM, etc…) • I/O Development: • Interface to DAQ • Distributed Computing (PROOF) • Interface to Tape • Data Challenges • Database Development (Catalogue and Conditions): • Installation • Maintenance of constant • Interface • Contribution to Event Display • DQM • At sub-event level responsibility is of detector experts • Full event is responsibility of the Offline team • Documentation

  6. Offline Tasks 2 • Offline Software Coordination: • DAQ Integration • Coordinate the work of detector software subgroups • Reconstruction • Calibration • Alignment • Geometry DB • Histogramming • Montecarlo Integration • Data Structure • Geometry DB • Supervise the production of collaborating classes • Receive, test and commit the code from individual subgroups • Computing Coordination: • Hardware/Software Installation • Users and queue coordination • Supervise Tier-0 and Tier- 1/2 computing facilities

  7. Manpower Estimate

  8. Responsibilities & Tasks • Detector experts: • LXe: Giovanni, Shuei, Ryu • DC: Matthias (hit), Hajime (Pattern), Lecce • TC: Pavia/Genova • Trigger: Donato (Pisa)

  9. Milestones • Start-up: October 2004 • Choice of the prototype Offline system: October 2004 • Organize the reconstruction code. December 2004 • per subdetector (simulation, part of reconstruction) • central tasks (framework, global reconstruction, visualisation, geometry database …) • Write down the Offline Structure (container classes, event class, etc…) : February 2005 • MDC: 4th quarter 2005 • Keep the existing MC in the Geant3 framework. Form a panel to decide if and how to migrate to ROOT: 4th quarter 2005

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