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Scenario: Peak Sale Resilience
Practice designing for a flash sale with hot products, payment pressure, promotion burn, and recovery from partial outages.
60 min
3 sections
scenario
resilience
peak-traffic
1
2
3
01. Design prompt
Section 1 of 3
A global brand runs a limited drop expected to drive 50x normal traffic. Inventory is scarce, bots are likely, promotions have a fixed budget, payment providers may throttle, and executives want real-time dashboards.
text
Hot path:
- browse product
- join waiting room
- add limited SKU to cart
- reserve or validate availability
- apply promotion
- authorize payment
- create order
- notify buyer
Failure cases:
- inventory changes during checkout
- payment provider timeout
- cart discount budget exhausted
- API extension latency spike
- search index lagBack to Course