[dns-operations] prefetching and thundering herds

Mark Delany b9w at charlie.emu.st
Wed Jul 15 20:04:23 UTC 2020


On 15Jul20, Philip Homburg allegedly wrote:
> From the point of view of latency hiding, it may make sense to always
> reduce the ttl so that a recursive resolver can reply to the stub
> resolver immediately and simultaniously trigger a refresh

That's a clever idea, tho it does presuppose that most of the stubs
are caching. In the worst case where no stubs are caching, all that's
been achieved is to increase the query rate to the recursive resolver.


Mark.


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