Remove/add [A] records based upon server availability

Danny Mayer mayer at
Sun Dec 27 18:51:18 UTC 2009

Михаил Фёдоров wrote:
> Hello.
> This has been discussed million times.
> DNS Round Robin A-records are NOT for implementing fail-safe structure
> in such way.
> Most browsers will fail when they get not-responding IP from round
> robin record and will not try to get another one.
> And some of clients will cache this IP, so deleting it upon death will not help.

I would add that the number of applications (never mind just browsers)
that will look at more than one A record response in order to try the
next answer if the first fails to respond can be counted on one hand.


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