775 tutorials · free to read

A working handbook for data and software engineering.

Hands-on tutorials by Alex Merced on Apache Iceberg, the data lakehouse, pipelines, agentic AI, and the languages and tools that hold it all together.

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  1. 01What to Assert When You Test an Iceberg PipelineFixtures, in-memory catalogs, and golden metadata: the assertions that catch wrong rows, unsafe reruns, schema drift, and concurrent-write corruption in CI.
  2. 02The 2026 Iceberg REST Catalog Compatibility ReportA repeatable test for what an Iceberg REST catalog actually serves, a scoring scheme that separates design from breakage, and the 2026 evidence across seven catalogs.
  3. 03Serving Iceberg Tables From Two RegionsThree multi-region topologies that work and one that mostly does not, what an Iceberg commit costs across regions, and where the catalog has to live.
  4. 04How Iceberg Catalogs Hand Engines Storage AccessCredential vending end to end: the wire protocol, scoped access on each cloud, remote signing, credential lifetime on long jobs, and failures that look like bugs.
  5. 05Kafka Connect to Iceberg: How the Commit Actually WorksExactly-once semantics in the Iceberg sink connector: the coordinator, the control topic, offsets stored inside Iceberg snapshots, and where duplicates still get in.
  6. 06The Open Lakehouse Explained, Then Built on Your Laptop with Dremio and MinIOThe five layers of the open lakehouse explained, then a lab: Parquet, Iceberg, Polaris, Arrow, and Ossie running in two containers on your own machine.