2 posts tagged with "merge-on-read"

Delete Files vs Deletion Vectors in Apache Iceberg: How V3 Rewrote the Economics of Changing Data
July 06, 2026
Iceberg v2 delete files vs v3 deletion vectors. How Roaring bitmaps and per-file vectors transformed merge-on-read performance for CDC and streaming workloads.
Implementing Positional Deletes in Iceberg v3: Streamlining Merge-on-Read for Fast-Inbound Event Lakes
July 06, 2026
![Papercut diagram comparing copy-on-write and merge-on-read update flows for an Iceberg event lake](/images/2026/week-2026-07-06/implementing-positional-deletes-in-iceberg-v3-streamlining-merge-on-read-for-fast-inbound-event-lakes-diagram-1.png)