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DQM Services: Status and Plans

DQM Services: Status and Plans. Christos Leonidopoulos CERN − PH for the EvF/DQM group. DQM Workshop (CMS week) – 28 February 2007. “What is DQM?”. DQM is: A monitoring project originally created for the Event Filter Farm

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DQM Services: Status and Plans

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  1. DQM Services: Status and Plans • Christos Leonidopoulos • CERN − PH • for the • EvF/DQM group DQM Workshop (CMS week) – 28 February 2007

  2. “What is DQM?” • DQM is: • A monitoring project originally created for the Event Filter Farm • A set of monitoring tools that can be used either on- or off-line: • Tree-like structures w/ histograms, profiles, scalars, strings • Quality tests that produce warnings, errors, alarms • Visualization tools • Transfer of monitoring information to remote nodes • A wrapper around ROOT objects that offers the above functionality • DQM is not: • A validation suite (just like ROOT is not a physics analysis) • A set of “out-of-the-box” templates that are ready to use

  3. “What can DQM do for me?” • Main reasons for using DQM: • Transfer of monitoring information over network • Creation/updates of histograms/profiles/etc transparent to user • Suitable for distributed systems • Library with quality tests, alarm generation/storage/distribution • Often updated w/ “algorithm donations” from users • Bonus: Extended usability by CMS helps w/ bug discovering/fixing (EvF, OnSel, all subdetector groups, beam-tests, MTCC, …) • Ongoing development over last 2 years: • Emilio Meschi (original design, run-control, mentoring) • CL (core functionality, rules & alarms library, tech support) • Dimitrios Tsirigkas (Web interface), Giulio Eulisse, Andrea Carboni (Qt-GUI) • Ilaria Segoni (specialized clients, coordination with detector groups) • Kurt Biery (DQM data & Storage Manager)

  4. DQM: On-line mode Monitoring producers See Emilio’s slides Monitoring consumers • On-line operating mode: • Monitoring producers → server → monitoring consumers • Useful when: • Need to access info from multiple monitoring producers • Need clear separation of production (sources) and processing (client) • of monitoring information (e.g. Filter Farm)

  5. DQM: On-line mode #2 CERN Network “Super Clients” “Clients” Non-CERN Network See Emilio’s slides What if you want something simpler?

  6. DQM: Off-line (standalone) mode Single program/node Monitoring producer Monitoring consumer • Merge source & client; eliminate collector • Useful when one wants to: • First access/produce monitoring information • Then process it • In the same program! • Equivalent to “off-line” or “validation” mode • Equivalent to a “standalone” ROOT macro

  7. DQM from a user’s perspective “Alarm” Possible today, but not managed by DQM “System ok” “DQM” • Create monitoring information • Process: Visualize, analyze, • determine quality, store • (à la ROOT or kumac macro) Monitoring information Client Tools Database • “Comparison-to-reference” • Collation of similar objects • Configuration • Reference objects • Historic plots • Etc…

  8. Core Features #1: The Basics 1 3 2 • Support for all the “usual stuff”: static and dynamic sets of objects • 1,2,3-D histograms, 1,2-D profiles, integers, floats, strings • (ROOT objects behind the scenes) • Support for tree-like directory structures

  9. Core Features #2: Quality Tests • Library with “rules” for assigning “quality” value to tests • Comparison to reference (χ2, Kolmogorov tests) • Contents within range ([xmin, xmax], ([ymin, ymax]) • Exact match • Mean of (e.g. gaussian) distribution “near” expected value • Check for dead channels • Check for noisy channels • Mean & RMS of bins within allowed range • Quality tests run automatically by DQM • Results “attached” to Monitor Elements • Can be saved in ROOT file for “off-line” use • “Alarm” library • Warnings & error messages propagating to all clients downstream

  10. Quality Tests: Examples 1 2 3

  11. Core Features #3: Output/Input • Support for ROOT-files • Create and save ROOT-files w/ (any subset of ) monitoring structure • on the fly (including results of quality tests) Can also read back file (“playback”), create MonitorElements, “attach” quality test results (1_2_0 feature)

  12. Web interface v2.0

  13. Customized SiStrip Web interface

  14. DQM Iguana Qt-GUI #1

  15. DQM Iguana Qt-GUI #2 Cosmic test data for calorimeter detector (reading from file)

  16. Recent highlights • Added the ability to group MEs from different folders/nodes: “Tags” • Similar to google mail’s “labels” • Improved interface for accessing MEs • Can open ROOT files in “playback” mode • Fit functions/results can be transferred to remote nodes • Improvements in code stability

  17. “Historic” Plots & DQM https://twiki.cern.ch/twiki/bin/view/CMS/DQMHistoricPlots

  18. Open items & to-do lists (savannah) DQM support requests: DQM bugs: DQM tasks:

  19. DQM documentation • Release notes for latest developments • http://cmsevf.web.cern.ch/cmsevf/DQM_doc/Release_Notes_v033.txt • Instructions for getting started • http://cmsevf.web.cern.ch/cmsevf/DQM_doc/DQM_instructions.html • Archive with presentations from DQM group: • http://cmsevf.web.cern.ch/cmsevf/DQMMeetings.html • DQM status for subdetector groups • https://twiki.cern.ch/twiki/bin/view/CMS/DQMSubDetectors • Twiki page with discussions, notes, manuals, links • https://twiki.cern.ch/twiki/bin/view/CMS/DQMInfrastructure

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