Caching in libunbound

Wouter Wijngaards wouter at
Thu Mar 21 12:26:09 UTC 2019

Hi Rick,

On 3/21/19 1:16 PM, Rick van Rein via Unbound-users wrote:
> Ah...
> I was thinking that Unbound might merge processes...
>> However, the hope
>> I had was that since Unbound == Unbound it might trust itself and allow
>> two streams of requests to come together.
> ...because it fork()ed a process in the background, which I assumed
> might be a shared Unbound daemon.
> Apparently this is just to service query/responses.  Unexpected, as I
> had setup an event loop and was tidily calling ub_process() and
> receiving its callbacks.
> To be honest, I don't really understand why Unbound doesn't have a modus
> operandi that supports event loops without thread or process!

It does, with the unbound_event api.  See libunbound/unbound-event.h

I believe this is also what getdns uses.

Best regards, Wouter

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