Delta Lake current infrastructure boundary

Evidence-backed facts

1. Delta Lake documents transactional batch table creation, reads, appends, overwrite, update, delete, merge, schema handling, and history. informative
2. Snapshot reads and time travel are distinct from writes, vacuum, optimize, protocol upgrades, schema mutation, and table replacement. informative
3. Object-store and catalog credentials, table permissions, retention policy, concurrent writers, engine version, and storage configuration bound operations. informative
4. ACID table semantics do not prove source facts, cross-system transactions, complete reader compatibility, successful maintenance, or a secured deployment. informative

Primary sources