young Fedora torrents spread data too slowly
Chuck Anderson
cra at WPI.EDU
Sun Oct 12 01:24:28 UTC 2008
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).
4 WORCESTER-BOSTON.GODDARD.GIGAPOP.NET (130.215.6.2) 1.947 ms 2.015 ms 2.041 ms
5 nox1sumgw1-Vl-591-NoX-WPI.nox.org (192.5.89.41) 2.111 ms 2.092 ms 2.470 ms
6 nox300gw1-Vl-803-NoX.nox.org (192.5.89.238) 2.991 ms 2.642 ms 2.679 ms
7 nox300gw1-PEER-NoX-INTERNET2-192-5-89-222.nox.org (192.5.89.222) 7.883 ms 7.856 ms 7.712 ms
8 ge-2-3-1.0.rtr.atla.net.internet2.edu (64.57.28.19) 12.137 ms 11.702 ms 11.662 ms
9 so-0-0-0.0.rtr.atla.net.internet2.edu (64.57.28.6) 25.262 ms 25.396 ms 25.401 ms
10 dep7600-gw2-internet2.ncren.net (198.86.17.65) 33.395 ms 33.404 ms 33.439 ms
11 rtp7600-gw-to-dep7600-gw2.ncren.net (128.109.70.137) 35.270 ms 35.507 ms 36.060 ms
12 rtp11-gw-to-rtp7600-gw-sec.ncren.net (128.109.70.121) 36.187 ms 36.056 ms 36.068 ms
13 ibiblio-gw-to-rtp11-gw.ncren.net (128.109.70.114) 36.363 ms 36.371 ms 36.509 ms
14 torrent1.fedoraproject.org (152.46.7.220) 35.207 ms !X 35.207 ms !X 35.268 ms !X
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