Hotel wifi fast generally but very slow on Wikipedia

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Brion Vibber

16 Jul 2015 16 Jul '15

12:45 a.m.

I'm seeing verrrrrry slow downloads from Wikipedia on the hotel wifi, on the order of 20-30 kbytes/sec, whereas I get a very respectable 500 kbytes/sec to everywhere else. slow test URLs: - https://en.wikipedia.org/wiki/Mexico - https://upload.wikimedia.org/wikipedia/commons/transcoded/b/b7/How_Open_Acc… vs fast downloads from my test site: - https://brionv.com/misc/mjpeg/How_Open_Access_Empowered_a_16-Year-Old_to_Ma… or the speed test widget at http://speedtest.comcast.net Does anybody know if this might be some kind of throttling specific to Wikipedia (did they notice we're all using it? ;) or a technical problem between our servers and the hotel's ISP? -- brion

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Ralf Roletschek

16 Jul 16 Jul

1:08 a.m.

New subject: Hotel wifi fast generally but very slow on Wikipedia

I have _upload_ 7 pictures with 26 MB in 3 Minutes. (150 kB/s) but in the time, who are the most eating ;) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=7&user=Ralf+… Ralf 2015-07-15 19:45 GMT-05:00 Brion Vibber <bvibber(a)wikimedia.org>rg>:

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-- ------ Ralf Roletschek https://commons.wikimedia.org/wiki/User:Ralf_Roletschek Fragen zum Fahrrad? - http://www.fahrradmonteur.de

Brion Vibber

1:20 a.m.

New subject: Hotel wifi fast generally but very slow on Wikipedia

On Wed, Jul 15, 2015 at 8:08 PM, Ralf Roletschek <ralf(a)roletschek.de> wrote:

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I have _upload_ 7 pictures with 26 MB in 3 Minutes. (150 kB/s) but in the time, who are the most eating ;) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=7&user=Ralf+…

Heh... on further poking, I can confirm that uploads run at the full ~500 kbytes/sec for me, but the response download *on the same connection* is right back down to 20-30 kbytes/sec. Weeeeird! :D When I get back downstairs I'll retest on the hackathon network, see if that behaves different from the hotel one. -- brion

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Ralf 2015-07-15 19:45 GMT-05:00 Brion Vibber <bvibber(a)wikimedia.org>rg>:

-- ------ Ralf Roletschek https://commons.wikimedia.org/wiki/User:Ralf_Roletschek Fragen zum Fahrrad? - http://www.fahrradmonteur.de _______________________________________________ Wikimania-l mailing list Wikimania-l(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikimania-l

Roan Kattouw

4:02 a.m.

New subject: Hotel wifi fast generally but very slow on Wikipedia

Anecdotally, I can say that the hackathon network was very slow this morning (I used the Hilton one since then), and that ssh to WMF servers on the Hilton network had pretty bad latency. On Jul 15, 2015 20:20, "Brion Vibber" <bvibber(a)wikimedia.org> wrote:

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On Wed, Jul 15, 2015 at 8:08 PM, Ralf Roletschek <ralf(a)roletschek.de> wrote:

I have _upload_ 7 pictures with 26 MB in 3 Minutes. (150 kB/s) but in the time, who are the most eating ;) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=7&user=Ralf+…

Ralf 2015-07-15 19:45 GMT-05:00 Brion Vibber <bvibber(a)wikimedia.org>rg>:

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Manuel Schneider

1:32 a.m.

New subject: Hotel wifi fast generally but very slow on Wikipedia

Hi Brion, such issues may be based on routing, depending of the peerings between the Hilton ISP and Wikimedia. One would need to check both ASes and use the respective looking glasses (does Wikimedia have one?) to check the routes. Many routes are also assymmetrical, so up- and downlink can vary. /Manuel Am 16.07.2015 um 02:45 schrieb Brion Vibber:

...

I'm seeing verrrrrry slow downloads from Wikipedia on the hotel wifi, on the order of 20-30 kbytes/sec, whereas I get a very respectable 500 kbytes/sec to everywhere else.

-- Wikimedia CH - Verein zur Förderung Freien Wissens Lausanne, +41 (21) 34066-22 - www.wikimedia.ch

Brion Vibber

1:50 a.m.

New subject: Hotel wifi fast generally but very slow on Wikipedia

On Wed, Jul 15, 2015 at 8:32 PM, Manuel Schneider < manuel.schneider(a)wikimedia.ch> wrote:

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*nod* Filed in phab and attached some traceroute info from my end: https://phabricator.wikimedia.org/T105984 -- brion

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/Manuel Am 16.07.2015 um 02:45 schrieb Brion Vibber:

I'm seeing verrrrrry slow downloads from Wikipedia on the hotel wifi, on the order of 20-30 kbytes/sec, whereas I get a very respectable 500 kbytes/sec to everywhere else.

-- Wikimedia CH - Verein zur Förderung Freien Wissens Lausanne, +41 (21) 34066-22 - www.wikimedia.ch _______________________________________________ Wikimania-l mailing list Wikimania-l(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikimania-l

Manuel Schneider

1:53 a.m.

New subject: Hotel wifi fast generally but very slow on Wikipedia

Oh, Cogent and Telia... I have seen issues between the two before... /Manuel Am 16.07.2015 um 03:50 schrieb Brion Vibber:

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*nod* Filed in phab and attached some traceroute info from my end: https://phabricator.wikimedia.org/T105984

-- Wikimedia CH - Verein zur Förderung Freien Wissens Lausanne, +41 (21) 34066-22 - www.wikimedia.ch

Emmanuel Engelhart

4:54 a.m.

New subject: Hotel wifi fast generally but very slow on Wikipedia

On 16.07.2015 03:50, Brion Vibber wrote:

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On Wed, Jul 15, 2015 at 8:32 PM, Manuel Schneider <manuel.schneider(a)wikimedia.ch <mailto:manuel.schneider@wikimedia.ch>> wrote: Hi Brion, such issues may be based on routing, depending of the peerings between the Hilton ISP and Wikimedia. One would need to check both ASes and use the respective looking glasses (does Wikimedia have one?) to check the routes. Many routes are also assymmetrical, so up- and downlink can vary. *nod* Filed in phab and attached some traceroute info from my end: https://phabricator.wikimedia.org/T105984

This remembers me similar problems we have had remarked in Hong-Kong (I don't remember the ticket number) where people had (still have?) problems to upload data to Commons even with theoretically good-enough connections. At that time is was IMO pretty obvious that we suffer of a lack of End-2-End approach of the problem (in particular lack of tool to make the correct measurements). Emmanuel -- Kiwix - Wikipedia Offline & more * Web: http://www.kiwix.org * Twitter: https://twitter.com/KiwixOffline * more: http://www.kiwix.org/wiki/Communication

Federico Leva (Nemo)

2:53 p.m.

New subject: Hotel wifi fast generally but very slow on Wikipedia

Emmanuel Engelhart, 16/07/2015 06:54:

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Context: bug 60283. http://phabricator.wikimedia.org/T62283

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At that time is was IMO pretty obvious that we suffer of a lack of End-2-End approach of the problem (in particular lack of tool to make the correct measurements).

Yeah, there are probably hundreds of regions with similar problems at least for some part of the users which we never get to know about. Nemo

Manuel Schneider

2:59 p.m.

New subject: Hotel wifi fast generally but very slow on Wikipedia

Am 16.07.2015 um 06:54 schrieb Emmanuel Engelhart:

...

At that time is was IMO pretty obvious that we suffer of a lack of End-2-End approach of the problem (in particular lack of tool to make the correct measurements).

that's exactly what we need a looking glass I have asked for. Almost every owner of an AS runs a looking glass to be able - and help other people to - analyse such issues. Because they are more common than you might think. So do we have a looking glass? If not, who can set up one? /Manuel -- Wikimedia CH - Verein zur Förderung Freien Wissens Lausanne, +41 (21) 34066-22 - www.wikimedia.ch

Brion Vibber

3:42 p.m.

New subject: Hotel wifi fast generally but very slow on Wikipedia

On Thu, Jul 16, 2015 at 9:59 AM, Manuel Schneider < manuel.schneider(a)wikimedia.ch> wrote:

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Am 16.07.2015 um 06:54 schrieb Emmanuel Engelhart:

At that time is was IMO pretty obvious that we suffer of a lack of End-2-End approach of the problem (in particular lack of tool to make the correct measurements).

I don't believe we do; someone has to manually log in and do the measurements so far. :( File a request in Phabricator for now and I'll bug the ops folks about it. :) -- brion

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/Manuel -- Wikimedia CH - Verein zur Förderung Freien Wissens Lausanne, +41 (21) 34066-22 - www.wikimedia.ch _______________________________________________ Wikimania-l mailing list Wikimania-l(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikimania-l

Manuel Schneider

5:24 p.m.

New subject: Hotel wifi fast generally but very slow on Wikipedia

Am 16.07.2015 um 17:42 schrieb Brion Vibber:

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I don't believe we do; someone has to manually log in and do the measurements so far. :( File a request in Phabricator for now and I'll bug the ops folks about it. :)

done: https://phabricator.wikimedia.org/T106056 /Manuel -- Wikimedia CH - Verein zur Förderung Freien Wissens Lausanne, +41 (21) 34066-22 - www.wikimedia.ch

Brion Vibber

3:39 p.m.

New subject: Hotel wifi fast generally but very slow on Wikipedia

Ok, Faidon poked at it: confirmed that one of the routes coming back from our servers to the hotel network was highly congested and switched priorities to the non-congested route. Much, much improved. :) Details at https://phabricator.wikimedia.org/T105984#1457294 -- brion On Wed, Jul 15, 2015 at 8:50 PM, Brion Vibber <bvibber(a)wikimedia.org> wrote:

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On Wed, Jul 15, 2015 at 8:32 PM, Manuel Schneider < manuel.schneider(a)wikimedia.ch> wrote:

*nod* Filed in phab and attached some traceroute info from my end: https://phabricator.wikimedia.org/T105984 -- brion

/Manuel Am 16.07.2015 um 02:45 schrieb Brion Vibber:

I'm seeing verrrrrry slow downloads from Wikipedia on the hotel wifi, on the order of 20-30 kbytes/sec, whereas I get a very respectable 500 kbytes/sec to everywhere else.

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participants (6)

Brion Vibber
Emmanuel Engelhart
Federico Leva (Nemo)
Manuel Schneider
Ralf Roletschek
Roan Kattouw