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We have been getting complaints of youtube intermittent performance issues. We’ve eliminated local problems. Someone discovered that a lot of the streaming was coming from a server in Taiwan. It looks like youtube determines the preferred server as I can see in Wireshark the server being queried by the client via DNS. We have registered a complaint and I’m sure Google will be all over it shortly. J

 

Has anyone else dealt with this. My impression is that youtube just isn’t always reliable for lots of reasons at home or here.

Faculty use it during class and seem to be surprised when it doesn’t perform well. It is a shame though, because there is a lot of great content.

 

Pete M.

********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.

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Even on a very good connection, I have also noticed issue with videos buffering on youtube.  Although I have not done a wireshark capture, I have noticed coming from different IP ranges help.  For example, a Time Warner cable modem connection can be very slow loading videos while a local ISP is very fast.  I think Michael has a good hypotheses as to why speeds are sporadic depending on blocks of IPs.


Message from kriss@proceranetworks.com

On 14 sep 2012, at 21:06, Jeremy Gibbs wrote: > Even on a very good connection, I have also noticed issue with videos buffering on youtube. Although I have not done a wireshark capture, I have noticed coming from different IP ranges help. For example, a Time Warner cable modem connection can be very slow loading videos while a local ISP is very fast. One thing to keep in mind when comparing speeds is that it's quite common for YouTube specific bandwidth throttling to occur on residential lines. The reason is fairly simple - most videos aren't watched until the end, buffering all of it at once could be seen as bits wasted. Bits wasted at peak hour hit either user experience or the bottom line. Cheers, Kriss ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
we had youtube issues a few years ago. turned out youtube was using akamai content delivery network(CDN). akamai uses ip-geolocation to decide which cache you hit. a neighboring state university had a local akamai caching server. the link between us and them was being rate limited. an itunes/iphone update was released and updates were going *slow*. disabled the link to our neighbor, causing traffic to go across I2. zoom! updates were all done in minutes putting a 1gbps jump in our I2. we've since contacted akamai about a local cache. akamai is very receptive(will give servers) to local caches. if it's worth it for akamai. ie: if you use enough bandwidth from them. you can also contact akamai if you're using a taiwan cache. akamai can change which cache your network/ASN uses... steven tardy network services mississippi state university On 09/14/2012 01:48 PM, Peter P Morrissey wrote: > We have been getting complaints of youtube intermittent performance > issues. We’ve eliminated local problems. Someone discovered that a lot > of the streaming was coming from a server in Taiwan. It looks like > youtube determines the preferred server as I can see in Wireshark the > server being queried by the client via DNS. We have registered a > complaint and I’m sure Google will be all over it shortly. J > > Has anyone else dealt with this. My impression is that youtube just > isn’t always reliable for lots of reasons at home or here. > > Faculty use it during class and seem to be surprised when it doesn’t > perform well. It is a shame though, because there is a lot of great > content. > > Pete M. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Pete,
 
Have you investigated Google Global Cache?  Our ISP, Utah Education Network (UEN), recently got this installed at no cost (AFAIK).  The realtime statistics for this server are 839 Mbps out, and 132 Mbps in.
 
http://ggcadmin.google.com/ggc
 
Cheers,
 
Tristan
 
--
Tristan Rhodes
Network Engineer
Weber State University
(801) 626-8549


>>> On 9/14/2012 at 12:48 PM, in message <47FE4CC0B92ADA478ECC286A11E973011F2764@SUEX10-mbx-03.ad.syr.edu>, Peter P Morrissey <ppmorris@SYR.EDU> wrote:

We have been getting complaints of youtube intermittent performance issues. We’ve eliminated local problems. Someone discovered that a lot of the streaming was coming from a server in Taiwan. It looks like youtube determines the preferred server as I can see in Wireshark the server being queried by the client via DNS. We have registered a complaint and I’m sure Google will be all over it shortly. J

 

Has anyone else dealt with this. My impression is that youtube just isn’t always reliable for lots of reasons at home or here.

Faculty use it during class and seem to be surprised when it doesn’t perform well. It is a shame though, because there is a lot of great content.

 

Pete M.

********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.

********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.

Thank you Tristan. I have a vague recollection of doing this before, but just submitted another application. It does say it is a beta program. Steven Tardy mentioned Akamai. We have an Akamai server on campus. I am contacting them as well. I’m wondering if Google still uses them if they are starting to do their own thing.

 

Thanks again to everyone for the suggestions.

Pete

 

Thank you for all the responses and suggestions. As an update I did follow up on applying for a google caching server. I have not heard anything back. I also entered a complaint with info, traceroutes etc in their tech support forum. I have not heard any response to that, but not really surprised. (Google is a lot like Apple in that regard). By Monday however, youtube appeared to be working very well, and it had stopped using the server in Taiwan. Something had to have been changed in their config to fix that, but we will never know who noticed and why. I also found out that Akamai does not have google/youtube as a customer which is why we weren’t making use of our local Akamai service. (I know they did in the past but are probably relying upon their own CDN).

 

Regards,

Pete Morrissey

 

Message from phrounds@syr.edu

Good morning Pete.

 

Would you mind summarizing your investigation into YouTube performance during tomorrow’s staff meeting?

I’m especially interested in your assessment: “It looks like youtube determines the preferred server as I can see

in Wireshark the server being queried by the client via DNS. We have registered a complaint and I’m sure Google

will be all over it shortly.” J

 

Thanks!

Respectfully,

Peter …

 

 

 

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