The lakehouse (Iceberg)
The Groundzero lakehouse stores tables in Apache Iceberg format on object storage, with one warehouse per site. The lakehouse console and its SQL editor run lakehouse SQL for you. Runtimes read and write the table data directly, with temporary access that applies your Groundzero roles and policies.
| Runtime | Engine versions | How it reaches the lakehouse |
|---|---|---|
| Standard | DuckDB 1.5.5 | Reads Iceberg tables (read-only) |
| DuckDB | DuckDB 1.5.5, iceberg extension |
Reads through the helper library (read-only) |
| Spark | Spark 3.5.6, Iceberg 1.11.0 | Reads and writes through the helper library |
| Lakehouse | Spark SQL 4.0.0, Iceberg 1.10.0 | Your SQL session in the Lakehouse pages (see the Lakehouse guide) |