Pace the fan-in

Metal 13
Zone RackTCPTCPNICAggregator 25GTop-of-rack…Shallow 1MNICWorkers 100x25g

Fix the board. Turn every goal green.

Goals

Not tested yet

The share of requests that get a correct answer.What the servers and services cost each month.

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.

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