Simon Allard wrote:
Bit of an off-topic request.
Does anyone has any stats on Recursive DNS appliances (infoblox etc) vs Bind on a server?
Has anyone actually seen real life improvements?
I spent some time a while back looking at various (open source) recursive DNS servers. Unbound was nice mostly because it was easily tunable to get decent performance out of it. Google's Namebench[1] is quite good at showing how your DNS servers perform. The basic thing appears to be that you need /really/ warm caches to get decent performance, especially in New Zealand. After replacing/tweaking/tuning some nameservers, we saw it take well over a week before it was getting reasonable perf results again. I suspect (although I've not done any work into this) that the one thing that will improve your nameserver performance is to have a huge cache and prefetch popular cache entries to avoid users ever seeing the cache miss latency. This I suspect will dwarf any other speed differences between any name server implementation. [1]: http://code.google.com/p/namebench/