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FHU Databridge
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Drift detection

Schema changes and value-distribution shifts between source-system snapshots. Value drift uses Jensen-Shannon divergence — anything above threshold is worth investigating.

Enterprise
Scheduler
Overall drift severity
medium
Schema changes 3
Snapshots 01 May → 01 Jun
  • type change
    fee_status — int → varchar(4) (relaxed)
  • column added
    ethnicity — added as varchar(4) nullable
  • length change
    domicile — varchar(4) → varchar(8) (widened)
Value shifts 2
Distribution drift by column (JS divergence)
  • student.domicile
    JS 0.410
    • XF78.0% → 78.0%
    • EU11.5% → 2.9%
    • NONEU8.6% → 18.2%
  • student.disability
    JS 0.120
    • 0092.0% → 64.8%