young Fedora torrents spread data too slowly

[Matt Domsch]

On Sat, Oct 11, 2008 at 09:24:28PM -0400, Chuck Anderson wrote:
> On Sat, Oct 11, 2008 at 06:16:27PM -0700, John Reiser wrote:
> > About 2230 UTC on Sat.Oct.11, the 67 leeches finished within a few minutes
> > of each other.  The torrents started about 0000 UTC.  So it took more than 22 hours
> > to distribute the 67 copies of 726MB of data.  That is approx. 10KB/s for each,
> > on average, which is very slow.  The expected speed is at least 10 times as fast.
> >
> > One theory is deliberate throttling/choking somewhere.
> > Here's a [current] traceroute for two of my machines that were in the swarm
> > during those 22 hours [first few hops omitted due to paranoia]:
> 
> I'm pretty sure this was throttling done by torrent1.fedoraproject.org 
> itself.  I was coming in via Internet2, and I assume the reverse route 
> was also via Internet2 (which might be a bad assumption).

Looks symmetrical to me.

traceroute to 130.215.6.2 (130.215.6.2), 30 hops max, 40 byte packets
 1  152.46.7.254 (152.46.7.254)  0.915 ms  1.139 ms  1.359 ms
 2  rtp11-gw-to-ibiblio-gw.ncren.net (128.109.70.113)  0.248 ms  0.238 ms  0.215 ms
 3  rtp7600-gw-to-rtp11-gw-sec.ncren.net (128.109.70.122)  0.364 ms  0.382 ms  0.427 ms
 4  dep7600-gw2-to-rtp7600-gw.ncren.net (128.109.70.138)  3.401 ms  3.452 ms  3.534 ms
 5  internet2-to-dep7600-gw2.ncren.net (198.86.17.66)  19.154 ms  19.150 ms  19.195 ms
 6  ge-0-1-0.10.nycmng.abilene.ucaid.edu (64.57.28.7)  23.927 ms  23.909 ms  23.908 ms
 7  ge-1-3-0.666.rtr.atla.net.internet2.edu (64.57.28.18)  28.981 ms  28.940 ms  29.070 ms
 8  nox300gw1-Vl-110-NoX-INTERNET2.nox.org (192.5.89.221)  33.709 ms  42.725 ms  48.957 ms
 9  nox1sumgw1-Vl-803-NoX.nox.org (192.5.89.237)  33.796 ms  33.829 ms  33.856 ms
10  nox1sumgw1-PEER-NoX-WPI-192-5-89-42.nox.org (192.5.89.42)  33.988 ms !X  34.042 ms !X  34.080 ms !X


-- 
Matt Domsch
Linux Technology Strategist, Dell Office of the CTO
linux.dell.com & www.dell.com/linux