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Lakehouse & Ingestion at Scale1 / 2

2 min lesson

The medallion (bronze/silver/gold) architecture

Take "The medallion (bronze/silver/gold) architecture" step by step, then finish with the result that proves it worked.

Step 1 of 2

Medallion is one rule: each layer raises trust and shape and you never skip a layer to save a hop. Bronze preserves, silver cleans, gold serves.

The point of layering is that different consumers need different contracts. A replay or audit needs raw fidelity; a dashboard needs a clean conformed table; an agent feature store needs a narrow purpose-built shape. Collapsing those into one table means every consumer fights every other consumer's requirements.

THE MEDALLION STACK

Interactive diagram. Tab through its regions; each focused region shows its detail in the panel below.

Gold - serving: Business marts and ML/agent feature tables, aggregated or feature-engineered for one specific query pattern. Always derivable from silver, never a second source of truth - if a gold table can't be regenerated, it has become a liability.

Each layer rests on the one below - and stays rebuildable from it.