Paths/Data Engineer/Modeling & Warehousing / Layers & Partitions
Define the Medallion Layers
Bronze, silver and gold - three layers with three different contracts. Write the definition so every producer knows where its data belongs.
Validator
⏱ 0:00
IDLE — checks run live as you type commands; submit when done
01Requirements
live checks- File ~/warehouse/model/layers.yaml exists○
- The config defines the bronze, silver and gold layers○
- Each layer states what it contains and how long it is kept○
02Walkthrough
1 of 3 revealed- 01
Write the layer definitions
bronze is the raw landing zone - append only, never transformed. silver is typed and deduplicated. gold is shaped for a specific question.
echo 'layers:\n bronze:\n description: raw events as they arrive, never modified\n retention_days: 90\n silver:\n description: typed, deduplicated and joined to the model\n retention_days: 365\n gold:\n description: curated tables for analytics and ML\n retention_days: 1095' > ~/warehouse/model/layers.yaml - 2 locked · each failed submit reveals one
03Stuck?
0 of 3 revealedTake a hint without losing the lab — each one points at the thing to look at, not at the answer.
04AI Tutor
guides, never solvesTell me what you're stuck on — I'll nudge, not solve. Which requirement are you looking at?
04Notebook
saved locally in this browserlearner@lab — ubuntu:24.04
Session is disposable
↑/↓ recalls commands · Ctrl+Enter submits · type help for the command list