Re: Facebook more specific via Level3 ?

["Radu-Adrian Feurdean" <nanog () radu-adrian feurdean net>]

On Tue, Mar 21, 2017, at 20:38, Jürgen Jaritsch wrote:

> I understand that FB is using some type of DNS geo-loadbalancing and other
> mechanism to redirect users to (possibly) nearer mirrors. The used DNS is
> directly requesting the root DNS and not any other public DNS (e.g. not
> 8.8.8.8). Running some requests within 3 minutes gives me the below
> results:
>
> www.facebook.com => star-mini.c10r.facebook.com. => 31.13.77.36
> www.facebook.com => star-mini.c10r.facebook.com. => 157.240.2.35
> www.facebook.com => star-mini.c10r.facebook.com. => 31.13.93.36
> www.facebook.com => star-mini.c10r.facebook.com. => 31.13.76.68

Hi, the load-balancing definitely doesn't choose the *nearest* mirror.
We are in France and unless we do dirty tricks, we *always* get directed
to US sites (as far as LA), with horrible performance. Everything since
end of December. As a consequence we let the dirty tricks in place
(query facebook.com and fbcdn.com on 8.8.8.8 instead of regular
recursive resolving) and we get directed to Frankfurt or Amsterdam
(never London or Paris).