Hi,
In the light of the recent discussions on TTL violations and server
stale here on the list, I decided to take a look on how often resolvers
perform TTL violations in the wild.
To do that, I used almost 10K Ripe Atlas probes. You can find a report
and datasets at:
https://labs.ripe.net/Member
I strongly disagree with your "terminology", TTL is a hint about maximum
caching period, not a demand or a contract.
A resolver can at any time for any reason discard cached entries.
Many Authoritative operators have "unreasonable" TTL's like less than 10
seconds or multiple days and I see no reaso
> On Dec 1, 2017, at 11:38 AM, Ólafur Guðmundsson wrote:
>
>
> I strongly disagree with your "terminology", TTL is a hint about maximum
> caching period, not a demand or a contract.
> A resolver can at any time for any reason discard cached entries.
Agreed.
> Many Authoritative operators
> On Dec 1, 2017, at 8:38 AM, Ólafur Guðmundsson wrote:
>
> I strongly disagree with your "terminology", TTL is a hint about maximum
> caching period, not a demand or a contract.
You say its just a hint. If you put a TTL of 1 hour on your data, and I have a
recursive name server that reuses
On Fri, Dec 1, 2017 at 5:02 PM, Wessels, Duane
wrote:
>
> > On Dec 1, 2017, at 8:38 AM, Ólafur Guðmundsson
> wrote:
> >
> > I strongly disagree with your "terminology", TTL is a hint about maximum
> caching period, not a demand or a contract.
>
> You say its just a hint. If you put a TTL of 1 h
On 1 Dec 2017, at 9:16, Ólafur Guðmundsson wrote:
> We are getting into religion here, the original poster called people that
> cap TTL's Heretics,
Looking through the mail archives, no one other than you is using that term.
--Paul Hoffman
___
DNSOP m
> On Dec 1, 2017, at 12:23 PM, Paul Hoffman wrote:
>
> On 1 Dec 2017, at 9:16, Ólafur Guðmundsson wrote:
>
>> We are getting into religion here, the original poster called people that
>> cap TTL's Heretics,
>
> Looking through the mail archives, no one other than you is using that term.
I th
I would be very interested in a bit more precision here. Is there a way to say
what is permissible vs impermissible re TTLs, and is there a way to say what is
desirable vs undesirable re TTLs? We all understand that longer TTLs reduce
the frequency of refresh at the expense of slower response
