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session metrics

NOkafor requested to merge session_metrics into main

Oozie to airflow app session metrics job migration

This job waits for the presence of all partitions in the last 7 days from the webrequest table then computes session related metrics for app pageviews

The job computes the following sessions metrics;

  • Number of sessions per user
  • Number of pageviews per session
  • Session length (gap between first and last pageview, in milliseconds)

The resulting output metrics are stored;

  • in output_directory/session_metrics.tsv
  • and also exposed through a hive external table at wmf.mobile_apps_session_metrics

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