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102 posts

Master Geek


  Reply # 594311 12-Mar-2012 20:29 Send private message

Beccara: Aren't most GGC's blackbox's as far as the ISP can see and it's operation remains under google's control?


You'd be correct that it is managed and maintained by google. 

6090 posts

Uber Geek
+1 received by user: 382

Trusted
Subscriber

  Reply # 594319 12-Mar-2012 20:44 Send private message

So how does an isp like snap get support in these instances out of curiosity?

566 posts

Ultimate Geek
+1 received by user: 8


  Reply # 594323 12-Mar-2012 20:47 Send private message

Statistics                              Downstream      Upstream

Line Rate                             11719 Kbps         1001 Kbps

Attainable Line Rate       13336 Kbps         997 Kbps

Noise Margin                     10.9 dB                 13.0 dB

Line Attenuation              32.5 dB                 16.5 dB

Output Power                   19.1 dBm             12.4 dBm

 

Auto DNS

 

C:\Windows\system32>ping cache.l.google.com

 

Pinging cache.l.google.com [202.124.127.18] with 32 bytes of data:

Reply from 202.124.127.18: bytes=32 time=12ms TTL=59

Reply from 202.124.127.18: bytes=32 time=12ms TTL=59

Reply from 202.124.127.18: bytes=32 time=12ms TTL=59

Reply from 202.124.127.18: bytes=32 time=12ms TTL=59

 

Ping statistics for 202.124.127.18:

    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:

    Minimum = 12ms, Maximum = 12ms, Average = 12ms

 

C:\Windows\system32>tracert cache.l.google.com

 

Tracing route to cache.l.google.com [202.124.127.18]

over a maximum of 30 hops:

 

  1    <1 ms    <1 ms    <1 ms  NB6PLUS4W.home [192.168.1.1]

  2    24 ms    24 ms    30 ms  20.17.69.111.static.snap.net.nz [111.69.17.20]

  3    14 ms    12 ms    13 ms  24.17.69.111.static.snap.net.nz [111.69.17.24]

  4    13 ms    12 ms    13 ms  46.17.69.111.static.snap.net.nz [111.69.17.46]

  5    16 ms    13 ms    13 ms  47.17.69.111.static.snap.net.nz [111.69.17.47]

  6    12 ms    13 ms    12 ms  cache.l.google.com [202.124.127.18]

 

Trace complete.

 

Google DNS

 

C:\Windows\system32>ping cache.l.google.com

 

Pinging cache.l.google.com [202.124.127.25] with 32 bytes of data:

Reply from 202.124.127.25: bytes=32 time=12ms TTL=59

Reply from 202.124.127.25: bytes=32 time=12ms TTL=59

Reply from 202.124.127.25: bytes=32 time=12ms TTL=59

Reply from 202.124.127.25: bytes=32 time=12ms TTL=59

 

Ping statistics for 202.124.127.25:

    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:

    Minimum = 12ms, Maximum = 12ms, Average = 12ms

 

C:\Windows\system32>tracert cache.l.google.com

 

Tracing route to cache.l.google.com [202.124.127.25]

over a maximum of 30 hops:

 

  1    <1 ms    <1 ms    <1 ms  192.168.1.1

  2    34 ms    13 ms    14 ms  20.17.69.111.static.snap.net.nz [111.69.17.20]

  3    13 ms    13 ms    12 ms  24.17.69.111.static.snap.net.nz [111.69.17.24]

  4    12 ms    12 ms    12 ms  46.17.69.111.static.snap.net.nz [111.69.17.46]

  5    13 ms    16 ms    13 ms  47.17.69.111.static.snap.net.nz [111.69.17.47]

  6    12 ms    13 ms    12 ms  25.127.124.202.static.snap.net.nz [202.124.127.2

5]

 

Trace complete.









=================

Made no difference

64 posts

Master Geek

Subscriber

  Reply # 594757 13-Mar-2012 21:09 Send private message

frizianz: *facedesk*

You guys are clearly missing the point.

Here is my straight up answer:

There is nothing wrong with the cache. Clearly there are other outside factors influencing the 'slow' youtube.


Agreed.

I've had a couple of users complaining about YouTube performance across our Snap VDSL.
I've just spent a few hours testing various videos through both Snap and Hosting Direct.
From what I can tell anything coming from Snap's cache is fine, first 40 seconds can buffer at ~30Mb/sec.
Anything not cached struggles to play without buffering.

On average 720p will stream at ~3mbps on Hosting Direct, Snap ~1mbps.

Traceroutes looks more favourable through Snap with fewer hops and lower latency but throughput is poor.

16 posts

Geek


  Reply # 594883 14-Mar-2012 01:06 Send private message

So ran tracert to www.youtube.com and the results came up with this:

------------------------------------------------------------------------------------

Tracing route to youtube-ui.l.google.com [74.125.237.38]
over a maximum of 30 hops:

1 1 ms 1 ms 1 ms RTA1320.home [192.168.1.1]
2 16 ms 34 ms 16 ms 16.17.69.111.static.snap.net.nz [111.69.17.16]
3 16 ms 16 ms 16 ms 54.32.69.111.dynamic.snap.net.nz [111.69.32.54]

4 58 ms 16 ms 17 ms 111-69-27-65.core.snap.net.nz [111.69.27.65]
5 16 ms 16 ms 16 ms 203.167.233.10
6 41 ms 40 ms 40 ms i-0-0-4-1.sydo-core02.bx.reach.com [202.84.142.1
49]
7 46 ms 47 ms 47 ms TenGige0-1-0-10.oxf-gw1.Sydney.telstra.net [203.
50.13.161]
8 41 ms 47 ms 47 ms Bundle-Ether1.ken-core4.Sydney.telstra.net [203.
50.6.5]
9 47 ms 47 ms 50 ms Bundle-Ether1.ken39.Sydney.telstra.net [203.50.6
.146]
10 41 ms 41 ms 41 ms 72.14.198.54
11 42 ms 41 ms 42 ms 66.249.95.224
12 42 ms 42 ms 42 ms 72.14.237.51
13 42 ms 42 ms 42 ms www.youtube.com [74.125.237.38]

Trace complete.

------------------------------------------------------------------------------------ 

 

202 posts

Master Geek


  Reply # 595237 14-Mar-2012 18:32 Send private message

Even with changing my DNS its still frustratingly slow.

Current throughput

1Mbit throughput for none cached content



237 posts

Master Geek


  Reply # 596500 17-Mar-2012 16:35 Send private message

Struggling on http://www.youtube.com/watch?v=YcGhtlovZ5o 480p *cry*




this is a slap in the face!

6090 posts

Uber Geek
+1 received by user: 382

Trusted
Subscriber

  Reply # 596522 17-Mar-2012 18:09 Send private message

shadybrothers: Struggling on http://www.youtube.com/watch?v=YcGhtlovZ5o 480p *cry*


Are you aware that video is private so no-one else will be able to test it to compare their experiences?

Is there another?

I haven't had an issue since I changed my hosts file, and whilst it shouldn't be a permanent solution, as a temporary workaround it seems to have helped a few people.  

237 posts

Master Geek


  Reply # 597349 19-Mar-2012 20:02 Send private message

Was a live stream, over by the time you post :)
having a look at the host file mod now

*Edit - no dice.




this is a slap in the face!

Just A Geek
1858 posts

Uber Geek
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  Reply # 597379 19-Mar-2012 20:53 Send private message

(I'm talking about google's caching servers).. I'm commenting on Orcon's servers (not snaps) but google caches should work the same with most ISPs.

If a part of a video (videos are saved in various chunks on the servers) is not cached it will come from overseas..

You can see this by doing a tcpdump of a video that no one has watched and if it is not in the cache it will come from overseas.

If you watch the video again you will see most of the parts will come from the cache and play really fast.

Ie on an Orcon connection the uncached video will come from overseas (AU or US)
and if the parts of the video are cached it will come from 60.234.81.X address

Live videos (www.youtube.com/live) look like they come from the local cache

Also to note.. if you are using google's/opendns DNS it will STILL sending you to the local cache.

If people think using opendns/google dns makes the videos faster then maybe the uncached version is coming from a faster location ?????

nslookup cache.l.google.com 60.234.1.1
Server: 60.234.1.1
Address: 60.234.1.1#53

Non-authoritative answer:
Name: cache.l.google.com
Address: 60.234.81.153


nslookup cache.l.google.com 8.8.8.8
Server: 8.8.8.8
Address: 8.8.8.8#53

Non-authoritative answer:
Name: cache.l.google.com
Address: 60.234.81.154

nslookup -type=a cache.l.google.com 208.67.220.220
Server: 208.67.220.220
Address: 208.67.220.220#53

Non-authoritative answer:
Name: cache.l.google.com
Address: 60.234.81.153

1468 posts

Uber Geek
+1 received by user: 106


  Reply # 598359 21-Mar-2012 19:57 Send private message

recieved a e-mail from Snap saying they have changed a few things and to test it out, well i dont know what they did but i find it worse than before, its like being back at Slingshot . Has anyone else recieved an e-mail and if so did it get better for them

214 posts

Master Geek
Inactive user


  Reply # 598367 21-Mar-2012 20:26 Send private message

i cant even stream 390p without it buffering and its getting worse

566 posts

Ultimate Geek
+1 received by user: 8


  Reply # 598429 21-Mar-2012 22:55 Send private message

vexxxboy: recieved a e-mail from Snap saying they have changed a few things and to test it out, well i dont know what they did but i find it worse than before, its like being back at Slingshot . Has anyone else recieved an e-mail and if so did it get better for them


Got the email and only been able to look at a few non popular videos.
However they do seem to need MORE buffering.

214 posts

Master Geek
Inactive user


  Reply # 598431 21-Mar-2012 23:01 Send private message

the throughput seems to bee rather capped, goto any other video site and its streams great

18 posts

Geek
+1 received by user: 1


  Reply # 598459 22-Mar-2012 05:50 Send private message

Hi, I got the same email and it seems to be no better for me than before. :(

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