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 <[EMAIL PROTECTED]> 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
-- Webmaster- http://hawaiidakine.com Admin- http://freebsdinfo.org --
Supporting Open Source Computing - - FreeBSD 6.* -- Debian Linux 3*
"All that's really worth doing is what we do for others."- Lewis Carroll
