Is bind support conditionally resolution?

[Giles Coochey]

On Tue, January 10, 2012 08:04, Drunkard Zhang wrote:
> 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?
> _______________________________________________

F5 have an entire product range of Load Balancers, which with a
combination of Link Controllers, Global Traffic Managers as well as
standard Local Traffic load-balancing can control traffic in a
particularly fine-grained way. Their product range is utlised by quite a
few big-players in conjunction with CDNs such as Akamai etc...
I
 suspect their pricing will turn out to be quite expensive, but if you
need specific 'dynamic' DNS resolution, based on latency, client IP
geo-location etc... then they are the commercial solution I would
consider.

I am sure that many other companies have similar product offerings (so as
not to make this a specific plug for a commercial product on a
non-commercial mailing list).