Data Lake - CI/CD Glossary Definition
A data lake is a central repository that stores raw data of any format at scale, typically on object storage. Schema is applied when the data is read, not when written, making ingestion cheap and flexible.
vs. warehouse
A lake stores raw, schema-on-read data; a warehouse stores cleaned, schema-on-write tables tuned for analytics. Many stacks use both.
Related guides
Data Warehouse - CI/CD Glossary DefinitionA data warehouse is a database optimized for analytical queries over cleaned, structured data - columnar, ind…
ELT - CI/CD Glossary DefinitionELT is Extract, Load, Transform - load raw data into the warehouse first, then transform it in place using th…
Parquet - CI/CD Glossary DefinitionParquet is an open columnar file format for analytics - compressed, schema-aware, and splittable - the defaul…