Statistics on ftp.fau.de news and statistics

Mirrors generating most traffic in 2025

Thu, 05 Feb 2026 12:00:00 +0200

The total outgoing traffic of ftp.fau.de increased from 10.06 PiB in 2024 to 10.22 PiB in 2025, a below-noise-level increase of only 1.5%.

Rank	Mirror	Traffic 2025 in TB	Rank/Traffic 2024 (for comparison)
1	mint/iso (Linux distribution, disc images)	1517	2 / 1381
2	kiwix (offline Wikipedia)	807	3 / 1106
3	almalinux (Linux distribution)	741	6 / 353
4	fdroid (Free and Open-Source Android app repository)	669	1 / 1794
5	cdn.media.ccc.de (recordings of IT-related events)	651	8 / 273
6	opensuse (Linux distribution)	592	5 / 354
7	gimp (Free and Open-Source image manipulation program)	541	15 / 203
8	fedora (Linux distribution)	510	4 / 438
9	macports	383	9 / 263
10	rockylinux	382	18 / 182

The percentage of IPv6 traffic increased marginally to 30% (3.02 PiB), after 29% in 2024, 26% in 2023, 26% in 2022, 27% in 2021, 27% in 2020, 25% in 2019, 22% in 2018, 22% in 2017, 14% in 2016 and 11% in 2015.

Mirrors generating most traffic in 2024

Wed, 04 Feb 2026 15:21:00 +0200

The total outgoing traffic of ftp.fau.de increased from 8.51 PiB in 2023 to 10.06 PiB in 2024, an increase of only 18%.

Rank	Mirror	Traffic 2024 in TB	Rank/Traffic 2023 (for comparison)
1	fdroid (Free and Open-Source Android app repository)	1794	1 / 1639
2	mint/iso (Linux distribution, disc images)	1381	2 / 1040
3	kiwix (offline Wikipedia)	1106	3 / 1021
4	fedora (Linux distribution)	438	5 / 456
5	opensuse (Linux distribution)	354	7 / 244
6	almalinux (Linux distribution)	353	28 / 66
7	epel (Extra Packages for Enterprise Linux)	282	12 / 192
8	cdn.media.ccc.de (recordings of IT-related events)	273	26 / 77
9	macports	263	27 / 68
10	ubuntu	259	11 / 200

The percentage of IPv6 traffic increased slightly to 29% (2.88 PiB), after 26% in 2023, 26% in 2022, 27% in 2021, 27% in 2020, 25% in 2019, 22% in 2018, 22% in 2017, 14% in 2016 and 11% in 2015.

Mirrors generating most traffic in 2023

Wed, 04 Feb 2026 14:45:00 +0200

The total outgoing traffic of ftp.fau.de increased from 6.57 PiB in 2022 to 8.51 PiB in 2023, an increase of 30%.

Rank	Mirror	Traffic 2023 in TB	Rank/Traffic 2022 (for comparison)
1	fdroid (Free and Open-Source Android app repository)	1639	4 / 494
2	mint/iso (Linux distribution, disc images)	1040	1 / 1075
3	kiwix (offline Wikipedia)	1021	3 / 726
4	centos (Linux distribution)	853	2 / 780
5	fedora (Linux distribution)	456	6 / 293
6	qtproject (Qt Toolkit)	261	5 / 295
7	opensuse (Linux distribution)	244	7 / 270
8	gimp (Free and Open-Source image manipulation program)	230	10 / 173
9	lineageos (Free and Open-Source Android distribution)	217	9 / 189
10	eclipse	215	8 / 238

The percentage of IPv6 traffic stagnated at 26% (2.23 PiB), after 26% in 2022, 27% in 2021, 27% in 2020, 25% in 2019, 22% in 2018, 22% in 2017, 14% in 2016 and 11% in 2015.

Mirrors generating most traffic in 2022

Mon, 06 Feb 2023 16:36:00 +0200

The total outgoing traffic of ftp.fau.de increased from 5.04 PiB in 2021 to 6.57 PiB in 2022, an increase of 30%.

Rank	Mirror	Traffic 2022 in TB	Rank/Traffic 2021 (for comparison)
1	mint/iso (Linux distribution, disc images)	1075	1 / 849
2	centos (Linux distribution)	780	10 / 160
3	kiwix (offline Wikipedia)	726	2 / 519
4	fdroid (Free and Open-Source Android app repository)	494	3 / 304
5	qtproject (Qt Toolkit)	295	4 / 275
6	fedora (Linux distribution)	293	8 / 186
7	opensuse (Linux distribution)	270	9 / 175
8	eclipse	238	7 / 193
9	lineageos (Free and Open-Source Android distribution)	189	6 / 199
10	gimp (Free and Open-Source image manipulation program)	173	5 / 266

The percentage of IPv6 traffic dropped slightly, it is now at 26% (1.68 PiB), after 27% in 2021, 27% in 2020, 25% in 2019, 22% in 2018, 22% in 2017, 14% in 2016 and 11% in 2015.

Mirrors generating most traffic in 2021

Mon, 14 Feb 2022 10:46:01 +0200

The total outgoing traffic of ftp.fau.de increased from 4.12 PiB in 2020 to 5.04 PiB in 2021, an increase of 22%.

Rank	Mirror	Traffic 2021 in TB	Rank/Traffic 2020 (for comparison)
1	mint/iso	849	2 / 389
2	kiwix (offline Wikipedia)	519	1 / 538
3	fdroid (Free and Open-Source Android app repository	304	5 / 242
4	qtproject (Qt Toolkit)	275	4 / 356
5	gimp	266	3 / 376
6	lineageos (Free and Open-Source Android distribution)	199	6 / 204
7	eclipse	193	- / 99
8	fedora	186	8 / 148
9	opensuse	175	10 / 108
10	centos	160	7 / 159

The percentage of IPv6 traffic stagnated, with 27% (1.36 PiB), after 27% in 2020, 25% in 2019, 22% in 2018, 22% in 2017, 14% in 2016 and 11% in 2015.

Mirrors generating most traffic in 2020

Mon, 14 Feb 2022 10:44:00 +0200

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.

Mirrors generating most traffic in 2019

Thu, 20 Feb 2020 14:17:00 +0200

The total traffic of ftp.fau.de increased from 3.22 PB in 2018 to 3.52 PB in 2019, an unusually small increase of only 9%.

Rank	Mirror	Traffic 2019 in TB	Rank/Traffic 2018 (for comparison)
1	qtproject (Qt Toolkit)	511	2 / 445
2	kiwix (offline Wikipedia)	458	1 / 476
3	mint/iso	260	5 / 255
4	lineageos (Free and Open-Source Android distribution)	246	3 / 327
5	eclipse	162	4 / 266
6	opensuse	138	7 / 119
7	fedora	136	6 / 137
8	cdn.media.ccc.de (Talk recordings from CCC and related conferences)	120	- / 94
9	centos	117	9 / 109
10	osmc (Open Source Media Center)	112	8 / 113

The percentage of IPv6 traffic increased a tiny bit again, to 25% (0.87 PB), after 22% in 2018, 22% in 2017, 14% in 2016 and 11% in 2015.

Mirrors Generating Most Traffic in 2018

Mon, 23 Sep 2019 13:47:00 +0200

The total traffic of ftp.fau.de increased from 2.51 PB in 2017 to 3.22 PB in 2018, a 28% increase.

Rank	Mirror	Traffic 2018 in TB	Rank/Traffic 2017 (for comparison)
1	kiwix (offline Wikipedia)	476	1 / 371
2	qtproject (Qt Toolkit)	445	2 / 274
3	lineageos (Free and Open-Source Android distribution)	327	3 / 203
4	eclipse	266	7 / 147
5	mint/iso	255	5 / 190
6	fedora	137	8 / 103
7	opensuse	119	5 / 152
8	osmc (Open Source Media Center)	113	6 / 149
9	centos	109	11 / 69
10	ctan (comprehensive TEX archive network)	95	10 / 93

Even though the absolute amount of IPv6 traffic increased a bit, its percentage of all traffic stagnated, with 22% (0.72 PB) in 2018, after 22% in 2017, 14% in 2016 and 11% in 2015.

Mirrors generating most traffic in 2017

Mon, 22 Jan 2018 12:06:00 +0200

The total traffic of ftp.fau.de increased from 1.89 PB in 2016 to 2.51 PB in 2017, by 33%. 203 TB alone was accounted to one of our newest additions from late may 2017: lineageos, a free and open-source android distribution and successor of cyanogenmod (which was discontinued).

Rank	Mirror	Traffic 2017 in TB	Rank/Traffic 2016 (for comparison)
1	kiwix (offline Wikipedia)	371	2 / 262
2	qtproject (Qt Toolkit)	274	1 / 264
3	lineageos (Free and Open-Source Android distribution)	203 (since late may)	- / -
4	mint/iso	190	5 / 134
5	opensuse	152	4 / 145
6	osmc (Open Source Media Center)	149	3 / 172
7	eclipse	147	6 / 131
8	fedora	103	7 / 115
9	cdn.media.ccc.de (Talk recordings from CCC conferences)	99	8 / 91
10	ctan (comprehensive TEX archive network)	93	9 / 76

The total IPv6 traffic increased significantly, to 22% (0.55 PB) of all traffic in 2017, from 14% in 2016 and 11% in 2015.

Mirrors Generating Most Traffic in 2016

Sun, 16 Apr 2017 12:00:00 +0200

It seems I haven’t posted the traditional annual mirror stats for 2016 yet. Well, lets fix that: Here are the most used mirrors on ftp.fau.de in 2016:

Rank	Mirror	Traffic 2016 in TB	Rank/Traffic 2015 (for comparison)
1	qtproject (Qt Toolkit)	264	1 / 199
2	kiwix (offline Wikipedia)	262	2 / 179
3	osmc (Open Source Media Center)	172	- / 35
4	opensuse	145	4 / 139
5	mint	134	3 / 179
6	eclipse	131	6 / 97
7	fedora	115	5 / 100
8	cdn.media.ccc.de (Talk recordings from CCC conferences)	91	7 / 83
9	ctan (comprehensive TEX archive network)	76	8 / 63
10	tdf (The Document Foundation - LibreOffice)	58	9 / 48

Comparing this list to last year, the first thing one notices is the new entry on rank 3: OSMC generates a steady amount of traffic, with visible peaks whenever they do a release. They were not in the 2015 top ten because we only started mirroring it in Q4 of 2015.

Evaluating Project Mirroring by Cost vs Profit

Mon, 11 Apr 2016 12:00:00 +0200

People operate mirrors out of different reasons, this could be purely altruistic to support open source communities, or to reduce incoming traffic by providing local clients with an internal package source, or to tilt the in/out ratio of the internet uplink. What ever the reasons are, they are all associated with the usage of outbound traffic and local storage size, in addition to occupation of other hardware and administrative resources. We will consider traffic and storage requirements as the costs and outgoing traffic as the profit (to the general public or an organization) a mirror service provides.

Mirrors generating most traffic in 2015

Wed, 03 Feb 2016 12:00:00 +0200

Here are the most used mirrors in 2015:

Rank	Mirror	Traffic 2015 in TB	Rank/Traffic 2014 (for comparison)
1	qtproject (Qt Toolkit)	199	1 / 172
2	kiwix	179	- / 0
3	mint/iso (Linux Mint ISOs)	177	10 / 31
4	opensuse	139	2 / 106
5	fedora	100	6 / 44
6	eclipse	97	4 / 86
7	cdn.media.ccc.de (Talk recordings from CCC conferences)	83	8 / 32
8	ctan (comprehensive TEX archive network)	63	7 / 40
9	tdf (The Document Foundation – LibreOffice)	48	5 / 48
10	videolan	40	3 / 88

Kiwix on rank 2 has only been mirrored since March 2015, so it generated that amount of traffic in only 9 and a half months - it might well take over the top spot next year. The Ubuntu release ISOs dropped out of the Top 10 for IPv4. As is to be expected, the CCC conference recordings generate extremely peaky traffic after CCC events - setting a new record high with 11.3 TB in just one day on December 30 (after 32C3). It might even have made a little bit more, but unfortunately the webserver ran out of threads because someone apparently distributed web-torrent-files with 64 KB of chunksize.

Mirrors generating most traffic in 2014

Wed, 18 Mar 2015 12:00:00 +0200

While we publish daily stats for all of our mirrors at https://ftp.fau.de/cgi-bin/show-ftp-stats.cgi, there is currently no aggregation over a whole year. So here are the most used mirrors over the whole year:

Rank	Mirror	Traffic 2014 in TB
1	qtproject (Qt Toolkit)	172
2	opensuse	106
3	videolan	88
4	eclipse	86
5	tdf (The Document Foundation - LibreOffice)	48
6	fedora	44
7	ctan (comprehensive TEX archive network)	40
8	cdn.media.ccc.de (Talk recordings from CCC conferences)	32
9	ubuntu-releases (Ubuntu CD Images)	32
10	mint/iso (Linux Mint ISOs)	31

The list is slightly different for IPv6.