DuckLake: The Lakehouse That Finally Embraces the Database

Graziano Montanaro
2026-05-29
Event PyCon Italia 2026
Speaker Graziano Montanaro
YouTube DuckLake: The Lakehouse That Finally Embraces the Database

Abstract

DuckLake challenges the dominance of Iceberg and Delta Lake by managing table metadata in a simple database instead of a complex file system, coupling the low-cost storage of object storage like S3 with the transactional guarantees of a standard SQL database. The talk covers DuckLake's design as well as its trade-offs, including the single-writer bottleneck for high-concurrency write scenarios, scale limits where distributed catalogs become necessary, and ecosystem maturity compared to established formats like Delta Lake and Iceberg.