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DNS not reset
09-09-2010, 01:29 AM (This post was last modified: 09-09-2010 02:38 AM by jabubo.)
Post: #1
DNS not reset
Hi,

when I submit a new test and set that it should do more than 1 test runs from that location, the second run benefits from the dns lookup of the first one.

Can you add a "ipconfig /flushdns" before any site lookup?

Example

test and execute PHP functions online free and easy => http://www.functions-online.com/home.html
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09-09-2010, 03:05 AM
Post: #2
RE: DNS not reset
The caching DNS service on windows is disabled on the test machines (so there's nothing to flush). What you are seeing is the upstream DNS servers at the ISP caching the responses for the TTL. If you're seeing responses under 50ms (for a DSL location) let me know, otherwise it's just an artifact of how DNS works.

Theoretically I could run Treewalk (bind port for windows) on the test machines themselves to eliminate all tiers of caching but that will tend to break some DNS-based geo-location services (like CDN POP localization) so there's not good answer.

Thanks,

-Pat
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09-09-2010, 04:18 PM
Post: #3
RE: DNS not reset
Ok, thanks for that answer and for the great work!

test and execute PHP functions online free and easy => http://www.functions-online.com/home.html
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