[bind10-dev] resolver performance research, take 2

[Jerry Scharf]

On 07/17/2012 11:19 AM, JINMEI Tatuya / 神明達哉 wrote:
> At Tue, 17 Jul 2012 09:09:51 -0700,
> Jerry Scharf <scharf at isc.org> wrote:
>> My guess is that the vast majority of these are queries with predictable
>> structure for things where the error is returned by a registry
>> controlled authoritative server. Would it make sense to allow the user
>> to configure a longer cache time for this case to reduce the upstream
>> queries? Would a 12 hour cache on these make a significant difference in
>> upstream queries? I bet just doing this for the root, where the real
>> world update rate is measured in months/years between additions of new
>> TLDs, would help quite a bit.
> Its real effectiveness aside, one possible way for the root zone would
> be to act as an unofficial secondary of root.  At least the F root
> server allows zone transfer, so anyone can be a secondary without
> breaking the integrity of the name space.  (How to integrate it in the
> resolver is a question, but here I'm just talking about possibilities
> feature-wise).
>
> ---
> JINMEI, Tatuya
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Jinmei,

Is it possible from your data to figure out which upstream returned the 
nxdomain? If so, we could get a better handle on whether this would be 
valuable.

jerry