Cut the network

Build
Level 30 of 41
Quorum

Difficulty 3 of 5

A five-node cluster splits into two groups. Keep every write safe and restore a leader within 0.6 seconds. Build the peer links before the split.

The board at the start of the level

Read and write quorumsLeft and right arrows change R. Tap to change W.

W 3 + R 3 of 5 · every read sees the last write

Goals and limits

Lost writes: none
Split-brain writes: none
Recovery time (RTO): under 0.6 s
Monthly cost: under 80 USD/mo
Traffic: 100 req/s

Concepts

How players did

Player results load from the server.