[LUAU] Slow internet response with different nameservers

[Al Plant]

Richard Z wrote:
> rr.com has 4 dns server listed, dns4.rr.com, dns3.rr.com, dns2.rr.com
> and dns1.rr.com. Unfortunately dns4 has very slow response time. In my
> testing more than 3-4 seconds. Sometime even no response.
> 
> When there are multiple dns servers, it is up to the dns client to
> decide how/where to send the queries. Some would send to the first
> one, wait for response, if no response then send to the second one.
> Other clients would send queries to all servers at the same time and
> use the first response. Others use round robin to choose which one to
> send query first. Without doing some research, I suspect linux always
> uses the first dns server which has the lowest response time in this
> case. Windows clients probably query all servers and get the response
> from the fastest server.
> 
> 
> 
> On 6/3/06, David Imai <dimai at email.com> wrote:
> 
>> > The RR servers are in Orange County CA and Oakland CA. The others 
>> are local.
>>
>> Even if this is the case, what is causing the slowness? Windows and 
>> Mac systems don't seem to suffer from the problem. Is it a problem 
>> with the way the nameservers are configured? or is it a problem with 
>> Linux or Ubuntu? I think if people who try to use Linux with RR 
>> experience this problem, they will probably blame Linux. HOSEF is 
>> planning to distribute desktop machines to people. It wouldn't be good 
>> if everyone who used RR ran into this problem. so what would be the 
>> best way to fix it before the user runs into it?
>>
>> -- 
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> 

I just read  where a misconfigured DNS server at an ISP can cause the 
delay. Could this be the case here if it's only the rr connected folos 
are affected?

I tried a test using a FreeBSD box:

if you run:
dig soa rr.com | more
you see a total dns response time of 154 ms from our noc.

dig soa lava.net | more
you see a total dns response time of 34 ms from our noc.

If this is any indication the rr slowness of response looks like there 
end and not from your OS on the local box.

Al Plant

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