SPECIFICATION · CONCEPT BRIEFDWG · 09-OPEN-ENDED-SCALE

Open Ended

No new concepts here — just compose what you know.

§01Putting it together

This level is a capstone: heavy traffic, bursty workload, mixed reads and writes. Every tool you've learned is on the table. There are multiple valid solutions.

Scale out with load balancers wherever a single node would saturate.
Cache anywhere reads dominate.
Queue anywhere a fast producer hits a slow consumer (especially writes).
Shard the database if its capacity is the ceiling.

§02How to approach it

⚑ NOTE

Iterate, don't design upfront

Start simple. Run the sim. Find the bottleneck. Apply the smallest change that addresses it. Repeat. The Copy Logs button is your friend.

⚑ CHEATSHEET · QUICK REFERENCE

Bottleneck → matching pattern → smallest fix → re-run.
Copy your logs and read them. The sim tells you exactly which node is hurting.

▸ THE EXERCISE

Big traffic, full toolbox. There's no single right answer — combine load balancers, caches, queues, and shards however you like. The simulation is the only judge.

▸ START EXERCISE BACK TO DRAWING SET