1. Web Data Quality Analysis http://lhcb.cern.ch/wdqa/ 1 WEB DATA QUALITY ANALYSIS Jonathan Levell Jonathan.Levell@cern.ch (Summer Student) Working with: Eric van Herwijnen (EvH) Agnieszka Jacholkowska (AJ)

2. Web Data Quality Analysis http://lhcb.cern.ch/wdqa/ 2 TALK OUTLINE Introduction How is the Data Quality Checking done? What is SICBCHK? What is WDQA? Results Typical Data CERN/MAP Summary

3. Web Data Quality Analysis http://lhcb.cern.ch/wdqa/ 3 Check Data Quality (DQ): During MC and DST production of test data After each detector modification Produce a standalone DQ program which calls checking routines supplied by subdetector groups Provide WDQA package to display and compare sets of histograms for each subdetector

4. Web Data Quality Analysis http://lhcb.cern.ch/wdqa/ 4 SICBMC SICBDST SICBCHK WDQA RAWH DST1/DST2 PostScriptGIFS NTUPLE HTML

5. Web Data Quality Analysis http://lhcb.cern.ch/wdqa/ 5 Fortran Program Separate from SICBMC/SICBDST (package called: SICBCHK) Split into branches for each subdetector Branches maintained individually Latest version installed in September

6. Web Data Quality Analysis http://lhcb.cern.ch/wdqa/ 6 * = JL leaves on 15th September

7. Web Data Quality Analysis http://lhcb.cern.ch/wdqa/ 7 SICBCHK.F UGINIT.FCHKRUN.FUGLAST.F CHKTRIG.F SUANAL.F For each event Initialisation Tidy Up SUCHECK.F Subdetector Routines Miscellaneous Checks

8. Web Data Quality Analysis http://lhcb.cern.ch/wdqa/ 8 Package controlled by.lmac scripts similar to PAW’s.kumac scripts Small Interpreter written in C++ Based on ROOT Converts ntuple files to ROOT files LMAC scripts can call ROOT macros Easy to use Manual currently being written Eventually details in Computing meeting

9. Web Data Quality Analysis http://lhcb.cern.ch/wdqa/ 9 // Conversion to ROOT files. hbookin ~/work/data/ >.hbook file 1 hbookin ~/work/data2/ >.hbook opt nowait outputdir velo ps velo.ps outputdir velo/gifs settitle Event Type: > (Vertex) zone 1 2 set style default plot 1001 set ymax 250 set fillcolor 5 file 1 overlay 1001 // Call standard ROOT macro rootpad fit2gauss.c gifs page1 wait ps close close file 1 close An Example.LMAC script

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25. Web Data Quality Analysis http://lhcb.cern.ch/wdqa/ 25 Bigger sample required before real conclusions can be drawn. Differences currently at 3  level Larger sample (500 events) will be requested, if possible with same random seeds. SICBCHK/WDQA still require more work but a new version will be released in mid-September