LLD - Design — Hotel Booking System
You are designing an availability checking system for a hotel booking platform. Which approach best ensures high availability and scalability when checking room availability in real-time?
You are designing an availability checking system for a hotel booking platform. Which approach best ensures high availability and scalability when checking room availability in real-time?
hard📝 Trade-off Q15 of 15
Step-by-Step Solution
Solution:
Step 1: Understand requirements for high availability and scalability
System must respond quickly and handle many requests without blocking.Step 2: Evaluate options for real-time availability checking
Cache availability data in memory with periodic sync to the database and use optimistic concurrency uses caching and optimistic concurrency, reducing database load and avoiding locks, improving scalability and availability.Final Answer:
Cache availability data in memory with periodic sync to the database and use optimistic concurrency -> Option BQuick Check:
Caching + optimistic concurrency = scalable availability [OK]
Quick Trick: Cache data and use optimistic concurrency for scalable availability [OK]
Common Mistakes:
- Using locking causing bottlenecks
- Scanning all records causing slow response
- Allowing double booking causing user issues
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