Where can you introduce Redis or Memcached to alleviate database read pressure?

What features are we building? For a service like Twitter, this might be: posting a tweet, following users, and viewing a timeline.

What are the system's operational constraints? Focus on scalability, availability, latency, and consistency. (e.g., "High availability is preferred over strict consistency," "Read latency must be under 200ms").

Hacking The System Design Interview Pdf |top| Jun 2026

Where can you introduce Redis or Memcached to alleviate database read pressure?

What features are we building? For a service like Twitter, this might be: posting a tweet, following users, and viewing a timeline.

What are the system's operational constraints? Focus on scalability, availability, latency, and consistency. (e.g., "High availability is preferred over strict consistency," "Read latency must be under 200ms").