Medallion architecture is a data lakehouse design pattern that organizes data processing into three distinct layers. The bronze layer stores raw, unprocessed data exactly as ingested from source systems. The silver layer applies data quality rules, cleaning, and basic transformations. The gold layer creates business-ready datasets optimized for analytics and reporting.
Why Bronze Silver Gold Architecture Matters
This bronze silver gold pattern provides several key benefits:
- Data Lineage: Clear tracking from raw sources to final analytics
- Quality Gates: Progressive improvement at each layer
- Reusability: Silver data can feed multiple gold use cases
- Governance: Consistent data quality and security policies
However, traditional implementations focus purely on technical architecture while ignoring the human incentive problem that causes 85% of data projects to fail.
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