Deletion Vectors

1. September 2, 202633 min read

   Inside the Puffin File Format

   The Puffin file format inside out, byte by byte, covering Theta sketches for distinct values and deletion vectors.

2. August 24, 202630 min read

   Deletion Vectors vs Position Deletes vs Equality Deletes: The Iceberg Delete Story in 2026

   Position deletes, equality deletes, and deletion vectors compared from the Iceberg spec: what each writes, how readers apply it, and when to use which.

3. August 19, 202631 min read

   Mastering Apache Iceberg v3 Deletion Vectors for High-Throughput Streaming Ingest

   Apache Iceberg v3 deletion vectors for high-throughput streaming ingest: how bitmaps and Puffin files fix CDC write amplification and read decay.

4. August 4, 202621 min read

   How Iceberg V3 Deletion Vectors Fixed Merge-on-Read for Streaming Tables

   How Iceberg V3 deletion vectors replaced accumulating positional delete files and made merge-on-read viable for streaming and CDC tables.

5. July 28, 202631 min read

   Why Iceberg V4 Wants to Retire Equality Deletes, and What Streaming Teams Should Do About It

   Equality deletes made streaming upserts into Iceberg practical at the cost of read performance.

6. July 13, 202617 min read

   Iceberg v3 Deletion Vectors and Faster DML

   An in-depth exploration of iceberg v3 deletion vectors and faster dml

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