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Towards Data Science0 Hot0 comments15 min read
The Medallion Data Architecture: An Introduction
The medallion architecture divides a data platform into three layers — bronze, silver, and gold — each with progressively higher data quality. Bronze stores raw, immutable ingested data with metadata. Silver applies validation, deduplication, type casting, and quarantines bad records. Gold contains aggregated, business-ready datasets. A working Python and DuckDB example demonstrates a retail orders pipeline that ingests CSV data, validates and cleans it through the layers, quarantines invalid rows, and produces daily regional sales aggregates. The post also covers idempotent ingestion using file hashes, production considerations like cloud object storage formats (Iceberg, Delta, Hudi), and orchestration tools like Airflow or Dagster.
Source: https://towardsdatascience.com/the-medallion-data-architecture. 8sync News only summarizes and links out; content copyright belongs to the authors and original sources.
