Time to live

  • Tune
  • Wire 08

Difficulty 2 of 5

One API stops at 0:10. The DNS cache keeps its answer for 300 seconds. Tune TTL and keep availability above 97 percent over one minute. Compare resolver load before and after.

Play level

DNSHTTP/2HTTP/2Users1,000 req/sDNS1 vCPU · 1 GBAPI server1 vCPU · 1 GBAPI server1 vCPU · 1 GB
DNSHTTP/2HTTP/2Users1,000 req/sDNS1 vCPU · 1 GBAPI server1 vCPU · 1 GBAPI server1 vCPU · 1 GB
The board at the start of the level
Answers with a time to liveDrag or use arrow keys to change the TTL

TTL 5 minutes · 12 lookups/h · old answers up to 5 minutes

Goals and limits

Availability
at least 97%
p99 latency
under 200 ms
Monthly cost
under 100 USD/mo
Traffic
1,000 req/s

Concepts

How players did

Player results load from the server.

All levels