Iceberg, Hudi, Delta, and Paimon at company scale — compaction ops, format wars, catalogs, and the S3-native future.
The freshest slice of the corpus: Adobe's Iceberg arc, Ancestry's 100-billion-row table, Kakao's operational takeaways, Whoop's schema-migration tooling — plus the deepest expert vein in the archive (Vanlightly's consistency-model series). This is also the natural partner-track cohort.
Warehouse→lakehouse moves run as parallel mirrors, and the catalog land-grab — Polaris, Unity, OpenHouse — where interoperability gets decided.
Look at your team's calendar for the week: a scheduled VACUUM window, a standing task to delete old data "to free disk," a resize planned for Saturday because it needs hours of downtime, and a recurring incident review about analytics being a day old. Every item is reasonable. Every item is also work that exists only to keep the current platform under its ceiling. When leadership asks "should we migrate, or can we tune our way out?" — how do you actually tell the difference?
This week is the migration playbook: the diagnosis, the cutover shape that survives production, and the layer the vendor war moved to while everyone watched the formats.
The full week 3 brief is part of LeetData Pro.
