...and to make things a bit more confusing...an NS query to my various
servers for different domains always sends the first response in the
registrar order and then it randomizes after the first request. So this
means that the load should be heavier on the primary name server as
registered, but the busier the domain, the more likely it would be
cached, and the more likely the load would be closer to 50:50, or at
least that's my read on this.
Another note, Windows desktops will do their own caching and they don't
round-robin, so don't query through your desktop to test this stuff out.
Matt
Matt wrote:
Dave,
I think the trick may be whether or not the DNS server that handles
the client requests round-robins the cache. It appears that Windows
2003 DNS does do this, and BIND also appears to do this based on tests
that I just did.
So maybe it does spread things evenly. I don't operate my own
secondary, so I can't compare the traffic.
Matt
Dave Doherty wrote:
Hi Matt-
In any event, the root servers will return a list of name servers. If
the first name server returned is offline, then the DNS client should
try the second, regardless of which is considered "primary" and which
is "secondary" as far as the registrar is concerned.
I only raise the issues about primary and secondary because all my
domains have dns.skywaves.net as the primary. That is a deicated name
server on a DS3, and it is never remotely overloaded. But
dns.skywaves.com, on a separate line at home, gets an awful lot of
inquiries.
-d
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