mutual forwarders in ISC BIND
andreev.peter at gmail.com
Thu Dec 29 07:33:19 UTC 2011
2011/12/29 Victor Sudakov <vas at mpeks.tomsk.su>:
> Victor Sudakov wrote:
>> > Victor, we researched this topic and learned that response time highly
>> > depends on distance between user and resolver, while cache influence
>> > on this value is lesser.
>> > So I advice you to keep all as is.
>> Be it so. Thank you.
> And the reason for the whole thread. One of the customers told me that
> 220.127.116.11 is faster than our own DNS servers which are located on the
> same 100 MBit/s LAN with them. I was shocked but it seems true, at
> least for the answers which are not yet cached.
I don't know what software google uses on its resolvers, but I suppose
something with shared or synchronizing cache. May be they also make
preventive lookups on popular domains to fill this cache. And the
reason why 18.104.22.168 seems faster - it answered from cache while your
resolver made full lookup chain.
> Victor Sudakov, VAS4-RIPE, VAS47-RIPN
> sip:sudakov at sibptus.tomsk.ru
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