From: Ellen K. 

This is interesting, so upfront it already actually knows the route (based
on IP address)?   I imagined it learned each next hop from the
current one.

But waitaminnit, the internet has dynamic routing, right?   (See, I
remember stuff I learned here before!!!)   So how can the complete exact
route be known upfront?

On Fri, 18 Feb 2005 06:08:46 -0500, "Geo" 
wrote in message :

>When you do a traceroute, the first thing it does is build a list of IP
>addresses that respond with a timeout packet, it then has to go and do a dns
>lookup on each of those IP addresses and those lookups could all be done
>simultaneously, in fact once you have the route (that list of IP's) it can
>go multithreaded to analyze each hop (dns, ping, arin lookups, whatever) to
>increase the speed of getting results.
>
>Geo.
>
>"Ellen K."  wrote in message
>news:e19b111u8u9cd4tho3p0pkmoa9nkb7d5e9{at}4ax.com...
>> Yeah, but how does it know the next dns name already if it hasn't yet
>> resolved the one it's trying to resolve now?
>>
>> On Wed, 16 Feb 2005 20:18:08 -0500, "Geo"
 wrote in
>> message :
>>
>> >Nope. Not for resolving the dns names which is what takes so much time.
>> >
>> >Geo.
>> >
>> >"Ellen K."  wrote in message
>> >news:89b611h4bts4p57qfcopdqppshn2lhejm2{at}4ax.com...
>> >> ?  Doesn't each one have to wait for the previous one?
>> >>
>> >> On Tue, 15 Feb 2005 23:14:57 -0500, "Geo"
 wrote in
>> >> message :
>> >>
>> >> >"Paul Ranson"  wrote
in message
>> >news:4211fab9{at}w3.nls.net...
>> >> >
>> >> >> But fibers came after threads, so fibers are
generally only used
>when
>> >the
>> >> >> application can benefit from doing its own
scheduling. A search for
>> >fiber,
>> >> >> sqlserver and msdn should turn up a couple of
interesting articles.
>> >> >
>> >> >I know the perfect usage for fibers, it could be used
to create a
>really
>> >> >fast traceroute program. One thread to do the
traceroute but multiple
>> >fibers
>> >> >each resolving a single node along the route. Because
each has to wait
>> >for
>> >> >input, the app thread should do the scheduling based on demand.
>> >> >
>> >> >Have I got the idea of your scheduling comment?
>> >> >
>> >> >Geo.
>> >> >
>> >>
>> >
>>
>

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