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johndhuk
PostPosted: Sat Oct 23, 2010 5:06 pm 
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Joined: Sat Oct 23, 2010 4:46 pm
Posts: 2
Hi,

I am launching a site for which I expect approximately 70/30 split UK/US visitors for which will make a LOT of REST requests.

I'm very impressed by Linode and will probably be joining shortly, but I was wondering if there is a way I could get pings from the data centres to compare their response times. Primarily I'm deciding whether it would be worth locating in NJ or London, but am open.

I personally get 20ms to London and 100ms to NJ from my home connection, however if the London server only got a slow ping to an API domain, and NJ was a lot quicker - it might be worth selecting, but currently I'm leaning to London.

The primary REST domains I will or may use are:
api.bing.net
boss.yahooapis.com
api.facebook.com


I don't know if this will make much difference, but I really want my site to be as responsive as possible for my users, I hate "feeling" slow sites which I know are making use of REST requests.

Thanks for your help/advice!
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JshWright
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PostPosted: Sat Oct 23, 2010 6:06 pm 
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Joined: Mon Oct 27, 2008 10:24 am
Posts: 173
Website: http://www.worshiproot.com
Linode billing is prorated to the day, so it wouldn't cost all that much to spin up a linode in each DC for a day or two to test your app (you'd pay for each up front, but get the balance credited to your account when you cancelled them).
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pclissold
PostPosted: Sat Oct 23, 2010 10:02 pm 
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Joined: Fri Oct 24, 2003 3:51 pm
Posts: 965
Location: Netherlands
Code:
newark:/home/peter# ping -c 100 -q api.bing.net
PING a134.g.akamai.net (96.17.154.19) 56(84) bytes of data.

--- a134.g.akamai.net ping statistics ---
100 packets transmitted, 100 received, 0% packet loss, time 99157ms
rtt min/avg/max/mdev = 1.395/1.456/1.591/0.059 ms


newark:/home/peter# ping -c 100 -q boss.yahooapis.com
PING boss-api.a1.b.yahoo.com (98.136.114.186) 56(84) bytes of data.

--- boss-api.a1.b.yahoo.com ping statistics ---
100 packets transmitted, 100 received, 0% packet loss, time 99143ms
rtt min/avg/max/mdev = 82.937/95.201/122.268/9.691 ms


newark:/home/peter# ping -c 100 -q api.facebook.com
PING api.facebook.com (66.220.149.29) 56(84) bytes of data.

--- api.facebook.com ping statistics ---
100 packets transmitted, 100 received, 0% packet loss, time 99145ms
rtt min/avg/max/mdev = 227.938/228.153/235.153/0.780 ms


Code:
london:/home/peter# ping -c 100 -q api.bing.net
PING a134.g.akamai.net (92.123.154.249) 56(84) bytes of data.

--- a134.g.akamai.net ping statistics ---
100 packets transmitted, 100 received, 0% packet loss, time 99152ms
rtt min/avg/max/mdev = 0.837/0.920/1.151/0.078 ms

llondon:/home/peter# ping -c 100 -q boss.yahooapis.com
PING boss-api.a1.b.yahoo.com (98.136.114.186) 56(84) bytes of data.

--- boss-api.a1.b.yahoo.com ping statistics ---
100 packets transmitted, 100 received, 0% packet loss, time 99141ms
rtt min/avg/max/mdev = 89.872/92.930/111.536/4.724 ms


london:/home/peter# ping -c 100 -q api.facebook.com
PING api.facebook.com (66.220.146.22) 56(84) bytes of data.

--- api.facebook.com ping statistics ---
100 packets transmitted, 100 received, 0% packet loss, time 99152ms
rtt min/avg/max/mdev = 155.828/155.929/156.169/0.454 ms

_________________
/ Peter
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hoopycat
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PostPosted: Sat Oct 23, 2010 10:03 pm 
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Joined: Sat Aug 30, 2008 1:55 pm
Posts: 1739
Location: Rochester, New York
I second Josh... firing up a few 512s around the Linode empire would be the best way to go, since you can then try some API calls to see what happens in the real world. You might want to look at Fremont, as well, since a number of Facebook API users tend to prefer it.

Thanks to the dedicated efforts of a few customers running remote sensing software, you can also do some basic measurements by messaging linbot on IRC, e.g.:

Code:
> /msg linbot mtr-atlanta api.bing.net
*linbot* [mtr] api.bing.net: 5 hops, no loss, last hop average RTT was 0.5ms


This works for atlanta, dallas, newark, fremont, and london.

Here's what I get from my Linode in Newark... api.bing.net is handled by Akamai (so it'll always be pretty close to anywhere), Yahoo looks decidedly west-coasty, and Facebook goes the wrong way around the planet.

Code:
rtucker@framboise:~$ mtr --report api.bing.net
HOST: framboise                   Loss%   Snt   Last   Avg  Best  Wrst StDev
  1. 207.99.1.13                   0.0%    10    7.8   2.2   0.4   9.8   3.5
  2. 207.99.53.41                  0.0%    10    0.3   0.4   0.3   0.5   0.1
  3. vlan801.tbr1.mmu.nac.net      0.0%    10    0.3   0.3   0.3   0.4   0.0
  4. 0.e1-3.tbr2.mmu.nac.net       0.0%    10    0.4   0.6   0.3   1.9   0.5
  5. 0.e1-2.tbr2.ewr.nac.net       0.0%    10    1.1   1.0   0.9   1.1   0.0
  6. bbr1.nyc1.bandcon.com         0.0%    10    1.7   1.7   1.6   1.8   0.1
  7. te-4-2.bbr1.ash1.bandcon.com  0.0%    10    8.0   8.0   7.9   8.2   0.1
  8. 209.107.215.96                0.0%    10    7.9   7.9   7.8   8.0   0.1
Code:
rtucker@framboise:~$ mtr --report boss.yahooapis.com
HOST: framboise                   Loss%   Snt   Last   Avg  Best  Wrst StDev
  1. 207.99.1.13                   0.0%    10    0.4   1.5   0.4  11.2   3.4
  2. 207.99.53.41                  0.0%    10    0.5   0.5   0.3   0.7   0.1
  3. vlan801.tbr1.mmu.nac.net      0.0%    10    0.3   0.6   0.2   2.7   0.8
  4. 0.e1-2.tbr1.ewr.nac.net       0.0%    10    0.9   0.8   0.8   0.9   0.0
  5. 0.e1-2.tbr1.tl9.nac.net       0.0%    10    1.2   2.4   1.1   7.9   2.6
  6. ge-1-1-0.pat1.the.yahoo.com   0.0%    10   71.0  86.1  71.0 177.9  34.4
  7. as-0.pat1.nyc.yahoo.com       0.0%    10   75.7  78.8  75.7  93.2   5.9
  8. ae-2.pat2.nyc.yahoo.com       0.0%    10   91.0  83.5  75.7  91.2   7.6
  9. UNKNOWN-216-115-100-92.yahoo  0.0%    10   82.4  97.2  81.5 210.6  40.4
 10. xe-2-2-0.clr3.ac4.yahoo.com   0.0%    10   81.7  82.1  81.5  82.7   0.5
 11. xe-9-2-0.clr3.ac4.yahoo.com   0.0%    10  106.3  87.2  81.7 107.3  10.4
 12. gw.oss.search.vip.ac4.yahoo.  0.0%    10   81.8  82.5  81.6  86.8   1.6
Code:
rtucker@framboise:~$ mtr --report api.facebook.com
HOST: framboise                   Loss%   Snt   Last   Avg  Best  Wrst StDev
  1. 207.99.1.13                   0.0%    10    0.4   1.8   0.4  10.2   3.2
  2. 207.99.53.41                  0.0%    10    0.4   1.5   0.3  10.3   3.1
  3. vlan801.tbr1.mmu.nac.net      0.0%    10    0.3   0.3   0.3   0.7   0.1
  4. 0.e1-2.tbr1.ewr.nac.net       0.0%    10    2.3   1.7   0.8   7.6   2.1
  5. 0.e1-2.tbr1.tl9.nac.net       0.0%    10   18.2   3.2   1.1  18.2   5.4
  6. linx.br02.lhr1.tfbnw.net      0.0%    10   73.8  74.5  73.6  81.9   2.6
  7. xe-5-3-0.bb01.iad1.tfbnw.net  0.0%    10  155.6 157.2 151.6 184.0   9.9
  8. xe-7-1-0.bb01.pao1.tfbnw.net  0.0%    10  224.5 228.3 222.0 279.4  18.0
  9. ae1.dr01.snc4.tfbnw.net       0.0%    10  225.6 228.9 225.5 246.8   7.1
 10. eth-17-1.csw04b.snc4.tfbnw.n 10.0%    10  222.7 222.7 222.5 222.8   0.1
 11. api-13-04-snc4.facebook.com  10.0%    10  222.5 222.6 222.4 222.9   0.2

Code:


					
																

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				johndhuk
			
			
				

				

									
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PostPosted: Mon Oct 25, 2010 7:06 am 

				

				

					
		


		

			
				

							

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Thank you all so much for your help!



The mtr access through linbot is perfect and has been a great help.



Fascinating results - Newark seems to be MUCH slower to the west coast than Atlanta. It's only negligibly faster than London for Yahoo BOSS.



Fremont is the undisputed king for APIs... every API I tested was around 2ms RTT! Sadly its obviously also the highest latency to London.







I set a Linode up in London yesterday, but I'm thinking I'll switch to Atlanta.



Thanks again!


					
										
					
					
					

							
				

				

					
		


		

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