[dns-operations] dns-operations at lists.dns-oarc.net

[Iñigo Ortiz de Urbina]

On Mon, May 7, 2012 at 8:27 PM, Steven Carr <sjcarr at gmail.com> wrote:
> I think you'll probably find that, averaged out over say a period of 1 hour,
> an active user will perform at least 1 query every 1-2 seconds.
>
> Twitter, Facebook, anything that uses Ajax and not to mention tons of other
> CDNs, Ad Networks etc. eat DNS queries like candy and then the underlying OS
> querying for various services which will inevitably end up at your resolver.
>
> Then don't forget IPv6, most of the new browsers already send a query for
> AAAA at the same time they query for A.
>

On my laptop, I am using dnssec-trigger and consuming unbound logs
with a local Splunk instance. There's plenty of AAAA queries, as well
as PTRs (utorrent's "geolocation" feature and the like). Twitter app
accounts for 8% of the queries, approximately (I cant tell about
Facebook).

Here's a detailed table:

A	391,016	79.693%	
PTR	55,315	11.274%	
AAAA	43,092	8.782%	
TXT	825	0.168%	
SOA	327	0.067%	
NS	47	0.01%	
SRV	6	0.001%	
MX	5	0.001%	
TYPE1169	  3	0.001% <- Berkeley's ICSI Netalyzr tests

This is making around 490,600 queries since January 1st, which gives
roughly 2.6 queries per minute. Keep in mind laptop isnt always on,
unlike modern desktops. You can make your own numbers if you consider
I am using the laptop for some 6 hours a day on average, to get a way
more real estimate. You can, also, easily measure it yourself.

Best,

> Steve
>
>
>
>
> On 7 May 2012 14:42, bert hubert <bert.hubert at netherlabs.nl> wrote:
>>
>> On Mon, May 07, 2012 at 09:13:50AM -0400, Stephane Handfield wrote:
>> > Hello DNS operators,
>> >
>> > I want to know what rules you follow in terms of capacity planning for
>> > your
>> > DNS. I am mainly interested in the best planning practice for caching
>> >  DNS.
>> > Definitly our rules need to reflect a lots of our own reality, in term
>> > of
>> > agility of deployment, risks, etc. But I'm really interested to know if
>> > exists any rule of thumb which mostly apply to any situations.
>>
>> Here's one. One resolving request per 'broadband residential internet'
>> subscriber per ten seconds.  This is the 'smooth peak nuber'.
>>
>> Holds up quite well, although this number is a bit old. It might be eeking
>> towards one request per five seconds now.
>>
>> Adjust width of thumb accordingly!
>>
>>        Bert
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>
>
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