open table formats

1. July 6, 202630 min read

   The State of Apache Iceberg v4 in July 2026: What the Dev List Tells Us About the Format's Next Chapter

   If you want to know where Apache Iceberg is headed, do not read the press releases. Read the dev mailing list. I say that as someone who reads it…

2. July 6, 202628 min read

   The State of Apache Parquet in 2026: The Quiet Format Enters Its Loudest Decade

   Apache Parquet is thirteen years old, holds more of the world's analytical data than any format ever created, and for most of its life has been the…

3. July 6, 202629 min read

   The State of Apache Polaris in July 2026: From Incubating Catalog to the Governance Layer of the Open Lakehouse

   I have a personal stake in this one, so let me declare it up front. Apache Polaris was co-created by Snowflake and Dremio, I work at Dremio, and I…

4. June 8, 202614 min read

   Apache Iceberg v4 Roadmap: Adaptive Metadata Trees, Single-File Commits, and the Delta Convergence

   Apache Iceberg v4 is not a single feature release. It is a set of architectural proposals: adaptive metadata trees, single-file commits, relative…

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