Add a node

  • Build
  • Level 34 of 41
  • Scale

Difficulty 3 of 5

The three cache nodes serve 90,000 reads/s. Add one cache node. Keep CPU use below 55 percent and move fewer than 30 percent of the 12,000 keys.

Play level

HTTP/2HTTP/2Users90,000 req/sLoad balanc…8 vCPU · 8 GBRedis cache0.5 vCPU · 1 GBRedis cache0.5 vCPU · 1 GBRedis cache0.5 vCPU · 1 GB
HTTP/2HTTP/2HTTP/2HTTP/2UsersLoad balan…Redis cacheRedis cacheRedis cache
The board at the start of the level
Keys on a hash ringArrow keys add or remove a node. Tap to switch the hash.

Hash ring · 3 to 4 nodes · 8 of 36 keys move

Goals and limits

Moved keys
under 30%
CPU use
under 55%
Monthly cost
under 120 USD/mo
Parts you can add
Redis cache
Part limit
2
Traffic
90,000 req/s

Concepts

How players did

Player results load from the server.

All levels