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Data processing

Data processing. P. Valente. Event data model. Legenda :. RECO. RAW. DCS. System. Event data. Task. Database. Super-THIN. Skimming. Analysis tasks. THIN. THIN. Skimming. RECO. Calibration task. RECO. COST. Reconstruction. CALB. RAW. Calibration task. CONF. COND. TDAQ.

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Data processing

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  1. Data processing P. Valente

  2. Event data model Legenda: RECO RAW DCS System Event data Task Database

  3. Super-THIN Skimming Analysis tasks THIN THIN Skimming RECO Calibration task RECO COST Reconstruction CALB RAW Calibration task CONF COND TDAQ DCS Detector

  4. Data flow Legenda: Trigger primitives data fragments PC Data Trigger Switch

  5. GTK Sub-detectors LKr Analog sums ADC TELL1 TDC CREAM RAM GTK readout LKr L0 1 Gbit Eth LKr L0 L0 L0 decision LKr L0 L0 L0TP

  6. TELL1 TDC GTK readout L0 L0 1 Gbit Eth data fragments data L0 assert data transmit to L1 Detector “boxes” L0TP T0 L0 L1M data fragments L1 PCs sub-detector events

  7. L1 selection L1M sub-detector events L1 PCs L1 accepted sub-events

  8. ADC CREAM RAM 1 Gbit Eth L1 LKr data Event building & L2 10 Gbit Eth LKr fragments L1 L1M L1 LKr fragments T1 T1 L2M sub-events L1 PCs Full event L2/EB PCs

  9. Record events L2 accepted event To Data Logging System L2 L2M T2 Full event L2/EB PCs

  10. GTK Sub-detectors LKr Analog sums ADC TELL1 TELL1 TDC TDC CREAM RAM GTK readout L0 L0 LKr L0 1 Gbit Eth 1 Gbit Eth 10 Gbit Eth Detector “boxes” L0TP L0 L1M L1M L2M Putting all together… L1 PCs L2/EB PCs

  11. Event sizes from TD

  12. Network links from TD

  13. Sub-detector PC’s from TD ?

  14. Data storage & processing Legenda: T0D1 T1D0 T1D1 Application Data server Farm Network transfer

  15. NA62 computing room CERN computing center (Tier-0) Off-site center(Tier-1/2) ? RAW RAW Online farm Replicate RAW offsite? If the answer is “Yes” A. RAW need to be transferred if one wants to make use of off-site computing power not only for analysis purposes RAW storage If instead the answer is: “No”, the question is: How to handle (re-)processing? If RAW are recorded on disk&tape at CERN computing center: B. the (re-)processing should run there

  16. NA62 computing room CERN computing center (Tier-0) Off-site center(Tier-1/2) A RAW RAW processing RAW Online farm RECO analysis Off-site processing

  17. NA62 computing room CERN computing center (Tier-0) Off-site center(Tier-1/2) A RAW RAW processing RAW Online farm RECO RECO analysis (If tape storage is not available off-site) Off-site processing

  18. NA62 computing room CERN computing center (Tier-0) Off-site center(Tier-1/2) B RAW RECO RAW Online farm analysis processing RECO CERN-IT processing If data are processed at CERN-IT center, only RECO are replicated off-site in order to run analysis jobs

  19. NA62 computing room CERN computing center (Tier-0) Off-site center(Tier-1/2) C RAW RECO RAW processing RECO RECO analysis An alternative is to have a enough computing power (and disk buffer) in the NA62 farm to run (re-)processing from disk NA62 farm Processing How much computing power? How much disk-space? Again, RECO only are replicated off-site in order to run analysis jobs

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