building a DNS system
Sten Carlsen
ccc2716 at vip.cybercity.dk
Wed Jul 19 13:34:34 UTC 2006
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Stephane Bortzmeyer wrote:
> On Wed, Jul 19, 2006 at 02:47:28PM +0200,
> Sten Carlsen <ccc2716 at vip.cybercity.dk> wrote
> a message of 23 lines which said:
>
>
>> What times should we expect for loading all those images?
>>
>
> It depends on:
>
> * wether you pick the first address (which does not work) or the
> second (which does work). Pure luck. "dig A broken.bortzmeyer.fr".
>
> * how your network infrastructure reports that the first address is
> not reachable (immediate ICMP "Network unreachable" or black
> hole?).
>
> * how your browser reacts to this unreachability.
>
> The purpose of this little experiment is to see wether a pure DNS
> redundancy solution is realistic for HTTP (I do not think so).
>
>
>
Given only the bogon IP, wget times out, again and again:
--15:22:37-- http://113.1.2.3/
(try:10) => `index.html'
Connecting to 113.1.2.3:80... failed: Operation timed out.
Retrying.
--15:24:02-- http://113.1.2.3/
(try:11) => `index.html'
Connecting to 113.1.2.3:80... failed: Operation timed out.
Retrying.
So nothing in the network is saying that host is unreachable or
something like that.
--
Best regards
Sten Carlsen
Let HIM who has an empty INBOX send the first mail.
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