Apache Iceberg Under the Hood — Module 03: Reads, Deletes & CoW vs MoR

Delete the same single row from two identical Iceberg tables and one rewrites a whole data file while the other writes a tiny tombstone beside it. This module shows both on screen, explains where position and equality deletes physically go, and corrects the mistake almost everyone makes — merge-on-read is not the fast option, it is the fast-WRITE option, and someone pays later. Chapters: 00:00 One row, two very different deletes 00:53 Deleting from a file you cannot modify 02:28 The same delete, merge-on-read 03:06 Position deletes, equality deletes, and the bill 05:23 Exercise 06:10 Solution 08:16 Recap Run the lab yourself: • Repo: https://github.com/venkatdwe/iceberg-... • This module's lab: https://github.com/venkatdwe/iceberg-... • Two commands: just lab-up && just m03-deletes Full course playlist:    • Apache Iceberg Under the Hood   GitHub repo: https://github.com/venkatdwe/iceberg-... #ApacheIceberg #DataEngineering #Lakehouse #DataLake #TableFormat