Turning an Analytics Question Into a Verified Agentic Graph
A complete AGS 1.0 graph for governed metric questions, with verification gates, deterministic check scripts, and reconciliation against a semantic layer.
Data engineering · Lakehouse · AI
Data Engineering, Lakehouses, and the Future of AI
Alex talks technology, data, software development and AI
642published posts
507topics covered
77published books
Welcome to my digital garden. This is where I share my deep dives, tutorials, and thoughts on the evolving data landscape.
As the Head of Developer Relations at Dremio and author of Apache Iceberg: The Definitive Guide, Apache Polaris: The Definitive Guide, and Architecting an Apache Iceberg Lakehouse, my mission is to make complex data architectures accessible to everyone.
What You'll Find Here
- Apache Iceberg & Polaris: Comprehensive guides on open table formats and catalogs.
- Data Lakehouse Architecture: Strategies for building cost-effective, high-performance data platforms.
- AI & RAG: Exploring the intersection of data engineering and Large Language Models.
- Dremio: Tips and tricks for using the Agentic Lakehouse Platform.
Latest writing
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Keeping Audit Snapshots Alive While Iceberg Snapshot Expiration Runs Every Night
How Iceberg snapshot tags keep audit snapshots alive through nightly expiration: retention calendars, RETAIN semantics, compaction cost, and erasure conflicts.
Twelve Queries That Pass Every Schema Check and Still Return the Wrong Number
Twelve query patterns that pass schema validation and still return wrong numbers, with detectors, required metadata, and tested code for each.