← Thursday, October 8, 2026ArchitectureDeep dive

Spanner powers an Iceberg catalog built for high-concurrency lakehouse workloads

cloud.google.com by Vinod Ramachandran, Mina Mikhail 7 min read Editor score 7/10

The piece examines how an Iceberg REST Catalog manages table pointers, atomic commits, and concurrent requests, including repeated small queries from agents. Catalog consistency and availability become important design constraints as data access scales.

What

The Lakehouse runtime catalog is a managed Apache Iceberg REST catalog powered by Spanner.

How

It maintains table pointers, supports atomic commits with compare-and-swap, and serves as the source of truth for table locations.

Why it matters

A scalable, available catalog helps lakehouse systems handle concurrent workloads, including repeated small queries from agents.

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