What specific features are we building? (e.g., "Are we designing just the Twitter newsfeed, or also the notification system?")
Explain the database choices. When do you use a NoSQL column-family store like Cassandra versus a relational database like PostgreSQL?
Step 3: Deep Dive into Specific Components (15–20 minutes) alex lu system design interview pdf upd
A structured approach to navigate ambiguous questions.
No system is perfect. Conclude by discussing single points of failure (SPOFs), monitoring, logging, and how the system handles peak traffic spikes or data center failures. Key Core Architectures to Master What specific features are we building
Outline the core RESTful endpoints or gRPC methods needed for the primary use cases.
The updated 2026 edition emphasizes why one solution is better than another, not just what the solution is. 5. Where to Find the 2026 Updated PDF Step 3: Deep Dive into Specific Components (15–20
Discuss trade-offs, potential bottlenecks, and future improvements. 🚀 Key Learning Resources
: Knowing exactly when to use vector databases for AI applications versus traditional NoSQL or Relational setups.