
DuckLake vs Apache Iceberg on AWS (2026): SQL Catalog or S3 Tables
DuckLake spec 1 shipped on 13 April 2026 and keeps lake metadata in a SQL database. DuckDB's architecture note puts Iceberg planning at about 100 ms per sequential S3 GET, roughly half a second before a query starts. On AWS, stay on S3 Tables when Athena, Glue, or Redshift must read the table.











