software

Data Lake

Definition

A data lake is a centralized repository that stores raw, unprocessed data in its native format — structured, semi-structured, and unstructured — at any scale. Unlike a data warehouse, a data lake imposes no schema at write time (schema-on-read).

Platforms like AWS S3 with Athena, Delta Lake, and Apache Iceberg are common data lake implementations. Data lakes enable flexible analytics and ML on heterogeneous data.

Related Terms

Data Warehouse

ELT

Extract, Load, Transform

Data Mesh

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