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Mirrors generating most traffic in 2020

It seems that I have not posted the traffic stats for 2020 yet. Well, better late than never, so here they are.

The total outgoing traffic of ftp.fau.de increased from 3.52 PiB in 2019 to 4.12 PiB in 2020, an increase of 17%.

Rank Mirror Traffic 2020 in TB Rank/Traffic 2019 (for comparison)
1 kiwix (offline Wikipedia) 538 2 / 458
2 mint/iso 389 3 / 260
3 gimp 376 – / 1
4 qtproject (Qt Toolkit) 356 1 / 511
5 fdroid (Free and Open-Source Android app repository 242 11 / 109
6 lineageos (Free and Open-Source Android distribution) 204 4 / 246
7 centos 159 9 / 117
8 fedora 148 7 / 136
9 videolan 114 – / 97
10 opensuse 108 6 / 138

The percentage of IPv6 traffic increased a tiny bit again, to 27% (1.13 PB), after 25% in 2019, 22% in 2018, 22% in 2017, 14% in 2016 and 11% in 2015.

There is some change in the Top 10 overall, with some mirrors traffic volumes (and thus placement in the Top 10) changing significantly, but most staying pretty much the same.

The most eye-catching change is the Gimp-mirror. We have been mirroring gimp since 2015, but this mirror never generated a lot of traffic. This changed rapidly in April 2020: Instead of less than 10 gigabytes per day, outgoing traffic jumped to over 3000 gigabytes a day average. The reason for this seems to be that they changed their download-page: While it would previously just give you a list of mirrors and ask you to select one manually, they would then send you to a mirror chosen randomly from a list of known-stable mirrors – which happened to include us. Later that year, traffic went down again, because they added more mirrors to said list – but around 800 gigabytes a day average still is quite good.

And as already anticipated last year, the mirror for F-Droid, a community-maintained Android software repository only hosting free/libre software (sort of an alternative to Googles “Play Store”), had no problem to reach the Top 10 in 2020. The reason is that since mid-2019 they made their clients use the mirrors instead of central servers far more often. As a result, this is now our 5th most requested mirror.