Is bind support conditionally resolution?

[Peter Andreev]

2012/1/10 Drunkard Zhang <gongfan193 at gmail.com>

> I am designing a big deploy system, which will implement via DNS. The
> demond is misc, one of them is conditionally resolve, which means that
> if one CDN node near unavailable, or latency increased significantly,
> no matter why, I want bind to give another second best result, which
> located in distant places.
>
> Is bind support this natively? Or I have to write external program?
>
> If bind doesn't support, is there any other DNS impletions I can try?
>

As Matus said DNS is not a good place for such magick. Nonetheless you can
use Bind with DLZ and some third-party script/program which will change
database entries depending on reachability or latency.
May be you should look at PowerDNS, it has something called "Dynamic
resolution" and its resolver has scripting support.

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