Databricks Architecture Decoded: Control Plane, Delta Lake, and Unity Catalog Explained

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Databricks operates across two core halves: a control plane managed by Databricks itself, hosting the web app, notebooks, and job scheduler, and a compute plane where actual processing occurs, either within the user's own cloud account or in Databricks' serverless environment. The platform runs on Azure, AWS, or Google Cloud, with raw data stored in the user's own cloud storage and never leaving their account. Delta Lake sits atop this storage layer, adding ACID transactions, schema enforcement, and time travel capabilities to standard Parquet files, effectively transforming a data lake into a lakehouse. Data within Delta Lake is typically organized into three zones — Bronze for raw ingestion, Silver for cleaned data, and Gold for business-ready aggregates. Unity Catalog serves as the overarching governance layer, managing permissions, data lineage, and providing a unified catalog across all workspaces.

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ProgrammingDEV Community ·

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