Hybrid Lakehouse Design for Regulated Markets

This article explores a hybrid lakehouse architecture for regulated markets like banking, healthcare, and defense, where data residency, sovereignty, or air-gapped environments prevent moving data to the cloud. It explains how open table formats, open catalogs (e.g., Nessie, Polaris), and federated read-only gateways enable analytics on on-prem object storage while exposing only metadata and views. The design supports agentic lakehouse patterns and addresses cross-region metadata without data leakage. It provides practical guidance for teams facing regulatory constraints, emphasizing that lakehouse patterns don't require centralization.