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Data size and IO performance report

Data size and IO performance report. ATLAS Software & Computing Workshop. Data size MC http://athena-infoioperformance.web.cern.ch/athena-infoIOperformance/MCsizes.html Streams http://athena-infoioperformance.web.cern.ch/athena-infoIOperformance/StreamsSizes.html

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Data size and IO performance report

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  1. Data size and IO performance report ATLAS Software & Computing Workshop

  2. Data size • MC http://athena-infoioperformance.web.cern.ch/athena-infoIOperformance/MCsizes.html • Streams http://athena-infoioperformance.web.cern.ch/athena-infoIOperformance/StreamsSizes.html • Categories http://athena-infoioperformance.web.cern.ch/athena-infoIOperformance/T0streams.html • IO performance • Possibilities for improvement Ilija Vukotic

  3. MC event size Ilija Vukotic

  4. MC event size *Compared to 22 Aug. 2010 Note: trigger size is not realistic as used trigger menu was not realistic. Problem rectified with addition of new aliases: Physics_default -> Physics_pp_v1 MC_loose_default -> MC_pp_v1_loose_mc_prescale MC_tight_default -> MC_pp_v1_tight_Mc_prescale (see bug report #74712). Ilija Vukotic

  5. Streams sizes • Only runs with 5k+ events • and good LBs • Shows: • AODs,ESDs and all DESDs • Events/total size/ev. size Ilija Vukotic

  6. Streams sizes ESD DESDM_EGAMMA AOD DESD_SGLMU DESD_SGLEL Ilija Vukotic

  7. Categories Ilija Vukotic

  8. Categories JetTauETMiss Muons L1Calo Egamma Details and list of collections in categories can be found at: https://spreadsheets.google.com/ccc?key=0AiPvgbRljNCodG5IY1BseHRHa2R5WjZoMGRnLXp0dHc&hl=en Ilija Vukotic

  9. IO performance Slow Bad CF KEEP IN MIND In real data TrackCollections are even larger ! Ilija Vukotic

  10. IO performance • Do we really need all of these? • No way to say if object is ever used. • What is so terrible about having a name attached to each object we store? Ilija Vukotic

  11. Possibilities for improvement • TrackCollection/TrackParticle container • Maybe 50kb in size and factor 2 in time • Few MB in memory • CaloShowerContainer • Probably can go down in size • Calo(Topo)TowerContainer • Gets recreated at read time • Must be possible to optimize further • TRT_Drift_Circle_Container • Must be faster and smaller My estimate: In total between 50 and 200kB/ev can be shaved in converters Should be possible >100ms/ev (currently at 480 ms/ev) Other options: Object removal. Cuts tuning Ilija Vukotic

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