Project Osmos Walkthrough: Building a Validated Gold Star Schema in Microsoft Fabric
adnan_hashmi · x · 2026-10-20
A hands-on walkthrough of using Project Osmos in Microsoft Fabric to turn AdventureWorksLT-style source tables into a validated Gold sales model. The source lakehouse is treated as an immutable boundary; Osmos profiles, models, stages, and promotes into a separate workspace, producing persisted Delta tables, a published notebook, validation evidence, and a reconciliation that exposed a source-data inconsistency. The article details the full value chain, Gold model grain design (5 dimensions, 1 bridge, 2 fact grains), and safe-execution rules like fail-if-exists semantics and atomic mutations.
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