Cezara Dragoi

S3 has a long history of using automated reasoning, but a core challenge has been applying these techniques to large systems while maintaining development velocity. Over time, we've learned to balance cutting-edge science with engineering velocity to accelerate development.

Compaction—the process of rewriting data and delete files to optimize layout—is the most critical maintenance task for any high-performance Iceberg implementation. However, as the specification grows to include complex features like Partition Evolution, Branching, and various Delete File types, ensuring that compaction remains identity-preserving becomes a non-trivial engineering challenge.