Design a Inventory Management for Airbnb
Last updated: July 21, 2025
Quick Overview
Design a scalable inventory management system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
Airbnb
July 21, 202524
14
98 solved
Design a scalable inventory management system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
Airbnb asks this during the System Design Round to assess your architectural thinking. They want to see how you decompose a complex problem, choose appropriate technologies, and reason about failure modes. Strong candidates proactively discuss monitoring, alerting, and operational concerns.
What the Interviewer Expects
- Clearly define functional and non-functional requirements
- Propose a reasonable high-level architecture with core components
- Choose appropriate data storage solutions with basic justification
- Discuss basic scaling strategies (horizontal scaling, caching)
- Identify potential bottlenecks and suggest simple solutions
Key Topics to Cover
How to Approach This
- Start by clarifying functional and non-functional requirements with the interviewer.
- Estimate the scale: QPS, storage, bandwidth. This drives your design decisions.
- Draw a high-level architecture first, then deep dive into 1-2 critical components.
- Discuss trade-offs explicitly (e.g., consistency vs availability, SQL vs NoSQL).
- Address failure scenarios, monitoring, and how the system handles 10x traffic spikes.
Possible Follow-up Questions
- How would you handle a region-wide outage?
- What happens if one of your database nodes goes down?
- How would you implement rate limiting to protect the system?
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Requirements
Functional Requirements
- Inventory Management: Ability to add, update, and remove inventory items (e.g., properties, availability, pricing).
- Search Functionality: Users should be able...
Capacity Estimation
Assuming Airbnb has around 7 million listings and handles approximately 100 million searches per month:
- Daily Requests: searches per day.
- *Peak Traffic...
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