Hi there,
On Fri, 1 Mar 2024, Matus UHLAR wrote:
On 01.03.24 08:24, Ond?ej Sur? wrote:
> The "sortlist" option allows to define a complicated rules when and
> how to reorder the resource records in the responses. The same
> caveats as with the "rrset-order" apply - relying on any specific
> order of resource records in the DNS responses is wrong.
>
> We are not aware of any other (major) DNS server that would have
> similar behaviour as this was never specified in the DNS protocol.
> If you know of any software or hardware relying on any specific
> order of the resource records in the DNS messages, it needs to
> be reported as a bug to the respective vendor.
I don't know about _requirement_, but I have used this option as poor
man's way to implement geographically local IP addresses
- to anyone return topologically closer IP addresses first, others next.
Maybe I need more of my morning $beverage but this sort of thing seems
to me to militate against other - existing - efficiency mechanisms.
Network performance isn't just about topology, there are things like
performance and load to consider. Might your tweaked responses just
send clients to a nearby but tragically overloaded server?
My preference would be to let those people whose job it is to think
about this stuff - which, reading this list, clearly they do - get on
with their job.
Observations welcome of course.
--
73,
Ged.
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