Stateless

Build
Level 15 of 41
Signal

Difficulty 3 of 5

A host fails at 0:30. Sessions must still work on the surviving API replica. Keep availability above 95 percent using two boxes and 40 USD per month.

The board at the start of the level

Light across a planetDrag or use arrow keys to pick a path

Lasers in orbit, New York to London · 7,151 km · 24 ms one way

Goals and limits

Availability: at least 95%
Error rate: under 5%
Monthly cost: under 40 USD/mo
Parts you can add: Redis cache, Memory cache
Part limit: 12
Hosts: 2 × 2 vCPU · 8 GB
Traffic: 1,000 req/s

Concepts

How players did

Player results load from the server.