Migrating Apache Iceberg Tables Between AWS Accounts: What Nobody Tells You

Migrating Apache Iceberg Tables Between AWS Accounts: What Nobody Tells You When my company needed to migrate to a new AWS account, I took on this project solo — and ended up successfully migrating nearly 2,000 Iceberg tables while maintaining full data integrity across both accounts. This wasn't a straightforward lift-and-shift. It required understanding Iceberg's metadata structure at a deep level, handling edge cases that aren't documented anywhere, and verifying data consistency at scale. Th