DNS cache prefetch

[seonwoolee]

Problem Description

I find that sometimes the response from AdGuard Home can be slow.

Proposed Solution

While it causes an increase in DNS traffic and load on the server, the unbound DNS resolver supports prefetching of cached entries.

Could this be added to AdGuard Home?

[lordraiden]

But DNS cache is not already implemented? what is the diference with this?

[ameshkov]

Here's the concept of prefetch:

1. Scan cached records that are about to expire
2. Asynchronously query them and update the cache

This feature makes perfect sense for a DNS recursor like unbound. Not so useful for a forwarder like AGH. But makes some sense.

[ghost]

any news on this feature ?

[ameshkov]

No, and tbh I prefer #2145

[ghost]

oh it's what it means optimistic, i have seen it but not oppened it since i haven't understood it would mean update the cache.
so it's for 0.107 (if nothing change of course), i had asked since here it's milstoned to 1.0. thanks i have my answer then.