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On-Line DQ Shift Tools Questionnaire results (24 June, 2013). Bruce M. Barnett Rutherford Appleton Laboratory. Overview Introduction Questionnaire (4) Conclusions 3/17 Respondents wrote: Not Applicable or Not Relevant. For the remaining 14 …. Overview. Generic Tools: DQMD, OHP - PowerPoint PPT Presentation
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On-Line DQOn-Line DQShift ToolsShift Tools
Questionnaire resultsQuestionnaire results(24 June, 2013)(24 June, 2013)
Bruce M. BarnettBruce M. BarnettRutherford Appleton LaboratoryRutherford Appleton Laboratory
OverviewOverview
•Overview•Introduction•Questionnaire (4)•Conclusions
• 3/17 Respondents wrote: Not Applicable or Not Relevant.• For the remaining 14 …
RC Workshop: On-Line DQ24 June, 2013 2
IntroductionIntroduction
•Generic Tools:• DQMD, OHP
•Detector specific Tools for• Parameter-tracking, status-overview, etc
RC Workshop: On-Line DQ24 June, 2013 3
Questionnaire (1/4)Questionnaire (1/4)
• What DQ tools did your shifters rely on?– DQMD, OHP (manual) or other
• DQMD: 10. OHP: 12. All that are using DQMD also monitored with OHP. • Other: Special tools like L1CaloMap, TRP, gnaMon, TRT-Viewer.• Two declared little or no online DQ monitoring.
RC Workshop: On-Line DQ24 June, 2013 4
Questionnaire (2/4)Questionnaire (2/4)
•What was the approximate number of histograms shifters were asked to constantly or frequently check by eye for your system?
– Typically from 10-20. (Also for each muon sub-system)– Tile and LArg use DQMD to alert the shifter that they should look through larger numbers of
available histogrammes. – The trigger monitors a larger number (~50)
• and the DQ shifter monitors a large number – 150.
•What was the approximate number of histograms checked automatically by DQMD algorithms?
RC Workshop: On-Line DQ24 June, 2013 5
Questionnaire (3/4)Questionnaire (3/4)
• Did you encounter performance problems with DQMD in the ACR?
– Stability improved towards the end of run-1– Performance worst for users with >500 Histogrammes
• slow or failure at startup, slow refresh. • One complained of inflexibility or difficulty
in keeping updated.
• Did you encounter performance problems with OHP in the ACR? – Problems reported
• lack-of-update, stability problems Slugishness (early on).
• Sluggishness and freezes due to a known memory leak issue.
• One labeled it as unusable.
RC Workshop: On-Line DQ24 June, 2013 6
Questionnaire (4/4)Questionnaire (4/4)
• How useful did you find the checks done by the ATLAS DQ shifter?– (ie, in addition to your system shifter’s monitoring)– Six thought useful, or very useful. – Six thought not useful.– A couple observed that sub-detector shifters often
found the problems first• but one noted that in a future with fewer shifters this would
underline the importance of a future role. • The DQ shifter needs to be well trained, equipped with the right
up-to-date documentation and have a good overview of ATLAS operation
• Did you use the masking mechanism (from 2nd half of 2012 to temporarily suppress single histograms?– Largely unused, at this point
• Three said they had, 11 had not.
– If yes, what was the policy as to who was allowed or supposed to mask a histogram?• System Run Coordinator, System Experts, or the two in consultation.
Or by a shifter under their instruction Specifically for histogramme debug or under known transient conditions
RC Workshop: On-Line DQ24 June, 2013 7
• DQMD– Rather widely used, reducing shifter load
• But OHP histogrammes still important
• Tools– Some Performance Issues
• Lack of scalability?
• DQMD Shifter– Not yet critical role
• May be enhanced in small shift-crew model– Extensive detector knowledge mandatory
ConclusionsConclusions
RC Workshop: On-Line DQ24 June, 2013 8