Most modern systems use a hybrid model:
We likely need a relational database (like MySQL/PostgreSQL) for user relationships and a NoSQL store (like Cassandra/DynamoDB) for the actual posts due to high write volume. system design interview alex hu pdf
Break down components, perform back-of-the-envelope estimations, and discuss trade-offs. Most modern systems use a hybrid model: We
: Designing a news feed (like Facebook), a notification system, a chat application, and YouTube. perform back-of-the-envelope estimations
– Covers newer patterns (e.g., distributed transactions, leader-follower, bloom filters, Paxos/Raft at a high level) and more advanced case studies (e.g., Zoom, Google Drive, real-time gaming leaderboard).
Example for URL shortener with 100M writes/month, 10B reads/month:
The book covers a wide range of topics, including: