John Reiser wrote:
Young torrents on http://torrent.fedoraproject.org/ spread data too slowly.
At 0500 UTC on Sat.Oct.11, there was 1 seed and 14 leeches, all at 13%
done.
At 1300 UTC on Sat.Oct.11, there was 1 seed and 31 leeches, all at 55%
done.
This is for F10-Snap1-x86_64-Live.
I turned my machine off for the night (US PDT), powered on in the morning,
and within half an hour had caught up to all leeches at 57% done.
I use tranmsissionbt, and I saw that the seed was sending pieces of 256 KiB
to me at 2.5 KiB/s, taking almost two minutes per piece (and then
"pausing.")
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]:
-----
traceroute to torrent.fedoraproject.org (152.46.7.220), 30 hops max, 38 byte packets
[server in internet hotel]
3 ge-6-0-0.edge-rtr02.ptldor02.iinet.com (198.145.40.99) 0.427 ms 0.424 ms 0.394 ms
4 fe-6-0-0-20.acs-rtr04.ptldor02.iinet.com (198.145.240.165) 0.855 ms 0.652 ms 0.521 ms
5 66-193-100-89.static.twtelecom.net (66.193.100.89) 1.711 ms 2.106 ms 1.613 ms
6 peer-01-so-0-0-0-0.snjs.twtelecom.net (64.129.248.17) 16.834 ms 49.743 ms 17.190 ms
7 te3-2.mpd01.sjc01.atlas.cogentco.com (154.54.6.81) 223.951 ms te8-2.mpd01.sjc01.atlas.cogentco.com (154.54.6.237) 74.034 ms te8-2.ccr02.sjc01.atlas.cogentco.com (154.54.6.233) 17.179 ms
8 te8-4.mpd01.lax01.atlas.cogentco.com (154.54.2.129) 63.993 ms te8-4.ccr02.lax01.atlas.cogentco.com (154.54.2.149) 38.244 ms 35.766 ms
9 te2-8.mpd01.iah01.atlas.cogentco.com (154.54.5.101) 75.458 ms te9-8.mpd01.iah01.atlas.cogentco.com (154.54.0.230) 264.798 ms te9-8.ccr02.iah01.atlas.cogentco.com (154.54.3.185) 63.395 ms
10 te4-2.ccr01.atl01.atlas.cogentco.com (154.54.7.237) 77.549 ms te9-2.ccr01.atl01.atlas.cogentco.com (154.54.24.1) 106.957 ms 78.105 ms
11 te8-2.mpd01.atl04.atlas.cogentco.com (154.54.3.174) 89.485 ms te7-1.mpd01.atl04.atlas.cogentco.com (154.54.6.114) 77.320 ms te7-3.mpd01.atl04.atlas.cogentco.com (154.54.6.122) 92.799 ms
12 MCNC.demarc.cogentco.com (38.99.223.154) 86.542 ms 86.692 ms 86.470 ms
13 torrent1.fedoraproject.org (152.46.7.220) 86.432 ms !<10> 119.191 ms !<10> 86.265 ms !<10>
-----
traceroute to torrent.fedoraproject.org (152.46.7.220), 30 hops max, 60 byte packets
[home ADSL]
4 fa0-13.na02.b006468-1.pdx01.atlas.cogentco.com (38.103.165.25) 49.514 ms 51.751 ms 51.966 ms
5 gi4-1.3506.core01.pdx01.atlas.cogentco.com (38.20.33.201) 53.016 ms 53.243 ms 53.924 ms
6 po10-0.core01.sfo01.atlas.cogentco.com (154.54.3.133) 68.408 ms 58.018 ms 58.898 ms
7 te3-1.mpd01.sfo01.atlas.cogentco.com (154.54.3.102) 61.053 ms 57.317 ms 57.872 ms
8 te7-4.mpd01.sjc01.atlas.cogentco.com (154.54.6.134) 60.721 ms 60.586 ms 58.419 ms
9 te8-4.mpd01.lax01.atlas.cogentco.com (154.54.2.129) 70.422 ms 69.758 ms 70.212 ms
10 te2-8.mpd01.iah01.atlas.cogentco.com (154.54.5.101) 106.394 ms te3-8.mpd01.iah01.atlas.cogentco.com (154.54.2.197) 105.619 ms 104.902 ms
11 te9-2.ccr01.atl01.atlas.cogentco.com (154.54.24.1) 118.926 ms 117.071 ms 118.478 ms
12 te7-1.mpd01.atl04.atlas.cogentco.com (154.54.6.114) 117.427 ms te7-3.mpd01.atl04.atlas.cogentco.com (154.54.6.122) 118.588 ms te8-4.mpd01.atl04.atlas.cogentco.com (154.54.3.170) 119.276 ms
13 MCNC.demarc.cogentco.com (38.99.223.154) 130.398 ms 126.942 ms 127.524 ms
14 torrent1.fedoraproject.org (152.46.7.220) 128.325 ms !X 128.997 ms !X 129.545 ms !X
-----
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