Å designe et storskalasystem innebærer å kombinere mange konsepter — håndtere massiv skala, velge passende arkitektur, databaser, caching, og administrere avveininger. Ved å bruke et konkret eksempel (et sosialt mediums feed) illustreres hvordan delene henger sammen.
Eksempel: et sosialt mediums nyhetsfeed
Requirements: millions of users; post content; see a feed of followed users' posts;
read-HEAVY (far more feed views than posts); low latency; high availability.
High-level components:
→ CLIENTS → LOAD BALANCER → APPLICATION servers (stateless, horizontally scaled)
→ DATABASES → user/post data (sharded); a graph of follows
→ CACHING (Redis) → hot feeds, posts, user data (crucial for read-heavy load)
→ CDN → media (images/videos)
→ MESSAGE QUEUES → async work (fan-out, notifications)
