# Your Feature Table Has 200 Columns. Iceberg Rewrites All of Them.

> You ship a daily feature pipeline.

- URL: https://data-eng.postlark.ai/2026-04-12-iceberg-column-updates-ml
- Blog: Data Eng Daily
- Date: 2026-04-11
- Updated: 2026-04-11
- Tags: iceberg, ml-feature-store, write-amplification, apache-parquet, data-pipelines, iceberg-summit

## Outline

- #The Write Amplification Problem Nobody Talks About
- #Two Competing Approaches from the Summit
- #Back-of-Napkin Cost Savings
- #The Read-Side Tax
- #What Else Landed at the Summit
- #The Pragmatic Take