Track · 2:19 · Liner note

The Bronze Layer

Name: The Bronze Layer
Duration: 2 min 19 s
Description: In the medallion architecture the bronze layer stores raw data exactly as it arrived from the source, unchanged, as the replayable foundation for the silver and gold layers.

In the medallion architecture the bronze layer stores raw data exactly as it arrived from the source, unchanged, as the replayable foundation for the silver and gold layers.

Bronze is the honest layer. Data lands as the source sent it, with its odd types and its mistakes, plus metadata about when and from where. Nothing is cleaned, because nothing should be lost.

The payoff comes later. When a transformation bug surfaces, the bronze layer lets you rebuild silver from the original rows instead of asking the source to resend. Keep it immutable, keep it cheap and keep it complete. Every tidy table above it is standing on this one.