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Physics selection: online changes & QA

Physics selection: online changes & QA. M Floris, JF Grosse- Oetringhaus Weekly offline meeting 30/01/2011. The problem. PbPb 2011 run  frequent changes of trigger configuration (trigger class names, offline selection...)

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Physics selection: online changes & QA

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  1. Physics selection: online changes & QA • M Floris, JFGrosse-Oetringhaus • Weekly offline meeting • 30/01/2011

  2. The problem • PbPb 2011 run  frequent changes of trigger configuration (trigger class names, offline selection...) • Did not propagate quickly enough from the trunk to the aliroot version used for the QA/AOD (i.e. the release) • The main issue is related to trigger class names (no name  no data) • The configuration is written in the OADB • Possible solutions: • Use a custom configuration in the QA macros (by hand) • OADB on alien, path containing rev number, path given on JDL • QA with analysis tag (one may need 1 tag/day + additional delays) Preferred https://savannah.cern.ch/bugs/?89170 Alice Physics Forum

  3. OADB on alien • Path contains the rev number, it’s written in JDL: • SplitArguments = {"/alice/…/#alienfilename# alien:////…/oadb_rev12345"}; • OADB size: ~ 29 MB (and counting), 80% centrality calibration • What it solves: • New trigger class names, improved selection with already existing cuts • Improved centrality calibration • What it does not solve: • An unforeseen selection cut is needed: this requires changing the classes (e.g. in 2010 we realized in the middle of the run that parasitic collisions could be rejected with ZDC) • Backward compatibility: if a new selection/calibration is implemented, this can in principle affect earlier runs (reprocessing old runs with the new OADB may change them) • If a class in OADB changes in the trunk, the new OADB may not be compatible with the rev (can be solved by policy) Alice Physics Forum

  4. Status • Local test successful (reading from Grid, as on a WN) • Job sent on the grid failed (all subjobs either expired or went into EIB) • Forensics (Latchezar): “jobs which ran killed for high memory consumption” • Local test w/ valgrind: no issue spotted • We believe this is not related to OADB • Request: make a full test on a run which was already reconstructed in the standard production • “The tests can be run after we finish with the Pb processing.” • Comments? Suggestions? Conclusions? Alice Physics Forum

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