[dns-operations] Order of dropped queries when the maximum number of recursive clients has been reached
jtk at ultradns.net
Fri Apr 28 15:11:08 UTC 2006
On Fri, 28 Apr 2006 14:27:22 +0000
Paul Vixie <paul at vix.com> wrote:
> my reason for answering this here is that, apart from what BIND does,
> there is an interesting question, what's the best thing for a
> recursive server to do? (if there's a case to be made, perhaps BIND
> could be encouraged to change its behaviour, along with other
If experience with routers tells us anything I think the current
BIND implementation is probably safest, if not the best approach.
I would be more interested in the querier's reaction to drops. I
was under the impression, perhaps incorrectly, that most resolvers
have a relatively simple retransmission mechanism, sending some
number of retransmissions in short fixed interval to a list of
servers before giving up.
Would any more refined strategy, such as an exponetial back-off for
a server that is not responding or sending back errors just cause undue
delay in most cases?
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