I also don’t know how important it is that a CDN be “near” you.

By definition, you’re probably talking a sustained download, either a video 
stream or some kind of large file download.  And most of the time you will see 
4 parallel TCP connections.  I really don’t think latency matters once you 
start the download.  What does matter is server balancing.  If your DNS server 
has correct geoIP but Netflix chooses to send your customers to a server in 
Dallas, maybe their Chicago servers are overloaded or undergoing maintenance.  
Do you really want to second guess their decisions?  About all you can do is 
make sure your DNS server is in the right place according to the geolocation 
database services, and let the content provider decide what IP address to hand 
out to your customers and how to route that IP (they may use geoIP info to 
decide the routing, not the DNS).

Now, if your DNS server appears to be in a whole wrong part of the world, that 
may have dramatic effects, like totally different content being available 
because Netflix thinks your customer is in Europe or Asia.


From: Mike Hammett 
Sent: Monday, March 23, 2015 11:55 AM
To: af@afmug.com 
Subject: Re: [AFMUG] testing DNS server performance

Pardon the mess, I'm on a laptop with a damn touchpad.




-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com



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

From: "That One Guy" <thatoneguyst...@gmail.com>
To: af@afmug.com
Sent: Monday, March 23, 2015 11:43:50 AM
Subject: Re: [AFMUG] testing DNS server performance


used the wrong term 
Ignore the term
Take cache out of thyne mouth

now, being a windows dick, I dont have torch

I want to simply be able to verify that appropriate CDNs are being utilized

namebench is still running, I dont know what its output is going to be

This cant be a new thing, I see threads occasionally about content being 
problematic in that users are getting less than desirable CDNs, it always seems 
to boil down to DNS,

I just want a tool that will tell me where the content is coming from. (in a 
perfect world, it would display on a map with a quality indicator to that CDN, 
I dont have any expectation that that component of the tool would exist)



On Mon, Mar 23, 2015 at 11:34 AM, Chuck McCown <ch...@wbmfg.com> wrote:

  Not generic.  You have to use the one they provide.  And they will not give 
to you unless you are doing some like 4tB per month.  

  From: Ken Hohhof 
  Sent: Monday, March 23, 2015 10:33 AM
  To: af@afmug.com 
  Subject: Re: [AFMUG] testing DNS server performance

  I was not aware you could cache Netflix streams with a generic caching 
server.  Not only due to DRM, but also Netflix app switches streams dynamically 
to match video quality to connection speed.  Plus first the customer 
authenticates to Netflix server, chooses what content to watch, etc.


  From: Chuck McCown 
  Sent: Monday, March 23, 2015 11:23 AM
  To: af@afmug.com 
  Subject: Re: [AFMUG] testing DNS server performance

  Say a new movie is on Netflix.  Or latest season of cards.  Everyone is going 
to want to watch it.  So 1000 simultaneous backbone streams to Netflix vs 1000 
simultaneous streams to the caching server in your NOC.  I choose the latter.


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

  From: "Ken Hohhof" <af...@kwisp.com>
  To: af@afmug.com
  Sent: Monday, March 23, 2015 11:08:27 AM
  Subject: Re: [AFMUG] testing DNS server performance


  I don’t understand how the caching server is going to help with CDNs.  
Actually, with so much Internet content now being either dynamic HTML or 
streaming, I wouldn’t think caching would be worth it, unless you are talking 
about something like a Netflix OpenConnect appliance.  Maybe you can cache 
software updates, I’m not sure about that.


  From: That One Guy 
  Sent: Monday, March 23, 2015 10:35 AM
  To: af@afmug.com 
  Subject: Re: [AFMUG] testing DNS server performance

  Geographically close CDNs. I want to make sure we are getting content from 
Illinoisish rather than california for netflix, since all that matters is 
netflix

  On Mon, Mar 23, 2015 at 10:30 AM, Josh Baird <joshba...@gmail.com> wrote:

    For performance, look at queryperf which I think is provided by ISC/bind. 

    I'm not sure what you mean by "we are getting good CDNs and the like," 
though.

    Josh

    On Mon, Mar 23, 2015 at 11:27 AM, That One Guy <thatoneguyst...@gmail.com> 
wrote:

      Im bringing live our first caching server today. Is there a good tool for 
comparing queries between DNS servers. 
      Im not all that concerned about speed since we are so small there wont be 
a huge amount of benefit I would think. Im primarily wanting to make sure we 
are getting good CDNs and the like


      -- 

      If you only see yourself as part of the team but you don't see your team 
as part of yourself you have already failed as part of the team.





  -- 

  If you only see yourself as part of the team but you don't see your team as 
part of yourself you have already failed as part of the team.





-- 

If you only see yourself as part of the team but you don't see your team as 
part of yourself you have already failed as part of the team.

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