Layer 4 vs. Layer 7 routing; Round-robin vs. Least connections Nginx, HAProxy, AWS ALB
Once the interviewer approves your high-level diagram, drill down into the bottlenecks dictated by your scale requirements:
Example (simple photo-sharing app):
This article dissects the search intent, explores the GitHub ecosystem for system design, and provides a roadmap to mastering distributed systems—without falling into piracy traps.
Caching reduces database load and slashes latency. You must be prepared to discuss eviction policies (LRU, LFU) and caching patterns: system design interview alex wu pdf github
Proactively identify potential weak points or areas that need better monitoring/logging.
If designing a system like YouTube, how do you handle video transcoding and massive egress bandwidth? If designing Twitter, how do you handle the "celebrity problem" (fan-out on write vs. fan-out on read)? Layer 4 vs
The books (Volume 1 and Volume 2) provide deep dives into real-world systems, which are frequently used as interview templates:
: Pirated PDFs are often early drafts or older editions that lack updated architectural patterns. Caching reduces database load and slashes latency