TinkerTTL 5 min: the answer had run out, so Larkspur’s office was asked. Page in 210 ms.1,200 km · 8 trips to the shop · 210 ms
Chapter 2 of 7
The remembered answer
Tomas in Eastport was on the shop 20 minutes ago. His resolver may still remember where the shop is.
This chapter: How long should an answer be remembered?
About this chapter
You will learn
- A TTL says how long an answer may be kept
- A remembered answer skips the directory
- A long TTL keeps old addresses alive after a move
Words you’ll meet
- Cache
- A store of answers already fetched, kept so the next request needn’t ask again.
- TTL
- Time to live: how long a resolver may keep an answer before it must ask again.
Step 1 of 5
Tomas visited 20 minutes ago. His resolver keeps a of answers, each for its .
Set the TTL to 1 hour.