Documentation and Lineage

Documentation and Lineage

Generate documentation sites and visual lineage graphs to understand model dependencies.

Why This Matters

Data lineage tracks data flow from source to consumption. Essential for debugging and compliance.

Key Concepts

Generate documentation sites and visual lineage graphs to understand model dependencies. In the context of dbt and Analytics Engineering, this is foundational for building reliable data systems.

Production Considerations

• Understand the performance characteristics and trade-offs
• Implement proper error handling for edge cases
• Monitor key metrics: latency, throughput, error rates
• Document decisions and maintain runbooks

Best Practices

• Use staging, intermediate, and marts layers
• Write tests for all models (unique, not_null, accepted_values)
• Document all models with descriptions
• Use ref() for all dependencies
• Keep models modular and single-purpose

Interview Tips

• Explain the dbt project structure
• How do you test dbt models?
• Describe your approach to data modeling with dbt

Documentation and Lineage — Deep Dive

Advanced Considerations

Data lineage tracks data flow from source to consumption. Essential for debugging and compliance. At a deeper level, mastering this involves understanding failure modes, performance boundaries, and integration patterns with the broader data stack.

Common Pitfalls

• Not handling edge cases: null values, empty inputs, malformed data
• Over-engineering: choosing complex solutions when simple ones suffice
• Ignoring observability: no logging, metrics, or alerting
• Skipping testing: not validating with production-like data volumes

Trade-offs and Alternatives

Every technical decision involves trade-offs. When evaluating documentation and lineage, consider: performance vs complexity, cost vs features, ease of use vs flexibility. The best choice depends on your specific requirements, team skills, and constraints.