Pace the fan-in

  • Fix
  • Metal 13
  • Rack

Difficulty 4 of 5

A search query asks 100 workers at once, and each answers with 64 KB. All answers cross one 25 Gbit/s switch port to the aggregator, which has a 1 MB buffer. The aggregator gives up after 5 ms. Make every answer arrive. One change.

14:02 Search answers incomplete in 9 of 10 queries. Graph: drops on the switch port to the aggregator.

Play level

Zone RackTCPTCPNICAggregator 25GTop-of-rack…Shallow 1MNICWorkers 100x25g
The board at the start of the level
Two power feedsTap to cut feed A. Arrow keys change the power per server.

Feed A 1.2 kW · feed B 1.2 kW · limit 2.5 kW each

Goals and limits

Availability
at least 99%
Monthly cost
under 10,000 USD/mo
Edit limit
1

Concepts

How players did

Player results load from the server.

All levels