Confidential engineering organization · anonymized case study
Catching Fabric migration risks before production
How a Microsoft Fabric architecture assessment turned hidden governance, ingestion-cost, and Direct Lake risks into a sequenced remediation roadmap.
This is an anonymized engagement. The client name, environment identifiers, proprietary workloads, and internal commercial details are intentionally withheld.
Client context
The situation.
An engineering organization was migrating a legacy Synapse environment into a Medallion Architecture on Microsoft Fabric. The team had a thoughtful semantic framework and real CI/CD discipline, but the physical Lakehouse design carried risks that would emerge at production scale.
Symptoms and risks
- More than 100 tables in one shared schema
- Destructive full-table-overwrite ingestion patterns
- Capacity Unit exposure hidden inside workload design
- A Gold layer not ready for Power BI Direct Lake
Review approach
How the problem was examined.
The work focused on evidence and decision quality before prescribing implementation.
Reviewed workspace and access governance
Assessed physical Lakehouse organization
Examined ingestion and workload patterns
Evaluated consumption-layer and Direct Lake readiness
Findings and recommendations
A sequenced path, not an unbounded backlog.
- Phase 1: establish schema-level isolation
- Phase 2: replace full overwrites with metadata-driven CDC ingestion
- Phase 3: prepare Star Schema and V-Order patterns for Direct Lake
Outcome
What changed.
The client received a concrete, prioritized sequence for closing the gaps before they became production incidents, including access exposure, compute-budget exhaustion, and consumption-layer limitations.
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