Consumer Interactions with Databases

The consumer processes monitoring the data stream will have frequent interactions with the database. It is possible that many of the consumers will write their results to the database. Some examples of consumers and possible read and write access to the database are (using their run 1 names):

• Calibration : Monitors datastream during calibration run.
  Writes to the Calibration DB.
• YMON : Monitors detector response.
  Reads the database for online calibrations and histograms (templates of valid detector response).
  Writes histograms and results to the Run Conditions DB.
• TRGMON : Monitors trigger performance.
  Reads the Trigger Table and Calibration DB (trigger calibrations to simulate the trigger).
  Writes results to the Run Conditions DB.
• LUMMON : Monitors luminosities and cross sections per trigger.
  Writes the famous lummon spew to the Run Conditions DB.
• PHYSMON : Monitors physics plots.
  Reads the database for online calibrations and histograms (templates of valid physics plots).
  Writes plots and results to the Run Conditions DB.
• Event Display : Displays of events during run.
  Reads the database for calibrations.
• Monitors : Other monitors like SPY (Level 3 physics), Beam, Luminosity, SVX, etc.
  Reads the database for calibrations.
  Writes plots and results to either CDF Conditions or Run Conditions DB.

Documents

• Consumers : The consumer template web page of K. Maeshima and H. Wenzel which describes the various consumers and their needs.