Re: [ilugd] Which mirror to use?

2004-09-21 Thread Mahesh T. Pai
Chirpy said on Mon, Sep 20, 2004 at 09:39:32PM +0530,:

  of many mirrors to get the software. What general guideline can one
  follow to select the  mirror site. Physical proximity obviosly does
  not work. Its something  to do about transatlantic cables, gateways
  and such but what exactly?

Compare output  of trace route for  each site. mtr/mtr-tiny  will be a
better alternative if you cannot understand output of traceroute.
 
-- 
 Mahesh T. Pai   http://paivakil.port5.com
free -  (adj) able to  act at will;  not hampered;
   not  under  compulsion  or restraint;  free
   from  obligations or  duties; not  bound to
   servitude; at liberty.

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[ilugd] Which mirror to use?

2004-09-20 Thread Chirpy
Hi list,
While trying to download software one often comes across options to use one
of many mirrors to get the software. What general guideline can one follow
to select the mirror site. Physical proximity obviosly does not work. Its
something to do about transatlantic cables, gateways and such but what
exactly?
Could getting stuff off Tucows be faster when using a miror in Philipines or
Canada? Is there a tool to predict network congestion and available
bandwidth?

Chirpy



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Re: [ilugd] Which mirror to use?

2004-09-20 Thread Manish Kathuria
Chirpy wrote:
Hi list,
While trying to download software one often comes across options to use one
of many mirrors to get the software. What general guideline can one follow
to select the mirror site. Physical proximity obviosly does not work.

Normally one would ping the mirror sites and compare the response time. 
You can also do a traceroute to see the number of hops and time required 
to reach a host. The mirror with the smallest response time should give 
you the fastest downloads. But this is assuming that the network 
conditions remain constant and routes to destination don't change. Even 
after you are able to identify the nearest mirror site in terms of the 
response time, the mirror may have some bandwidth limits imposed on a 
per download basis or could be on a small internet pipe (in terms of 
bandwidth) so you might end up getting a faster download from a remote 
site which does not have any bandwidth restrictions.
 Its
something to do about transatlantic cables, gateways and such but what
exactly?
It will mainly depend upon your ISPs backbones i.e. how it is connected 
to the rest of the internet. If its using satellite connectivity its 
bound to be slower than an ISP using submarine fibre optic cables.

Could getting stuff off Tucows be faster when using a miror in Philipines or
Canada? 
Canada from my PC at the moment !!
- Manish
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