[dns-operations] Load balancing DNS queries across many machines

Joe Abley jabley at hopcount.ca
Tue Jul 21 04:08:02 UTC 2009

On 16-Jul-2009, at 22:32, Michael Sinatra wrote:

> I see.  So the question was really, has anyone tried any kind of  
> stateful load-sharing protocol for DNS beyond anycast or CARP that  
> might have already done what you want to do.

I know of prominent DNS server clusters built out of individual hosts  
connected to a dedicated load-balancer device, like an f5 BigIP or a  
Foundry ServerIron. Those setups provide stateful load-sharing with a  
variety of origin server selection heuristics. Some of them do address  
family translation, which somebody mentioned.

For others who don't have UCB's experience with build nameserver  
clusters using anycast, I have written that experience up several  
times based (partly or entirely) on work we did at ISC, and maybe some  
of those contain some useful pointers.



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