[194184] in North American Network Operators' Group
AW: Facebook more specific via Level3 ?
daemon@ATHENA.MIT.EDU (=?UTF-8?Q?J=C3=BCrgen_Jaritsch?=)
Wed Mar 22 06:06:58 2017
X-Original-To: nanog@nanog.org
From: =?UTF-8?Q?J=C3=BCrgen_Jaritsch?= <juergen@jaritsch.at>
To: "'Radu-Adrian Feurdean'" <nanog@radu-adrian.feurdean.net>,
"'Doug Porter'" <dsp@fb.com>, <nanog@nanog.org>
In-Reply-To: <1490176932.2483603.919494848.3B91E17E@webmail.messagingengine.com>
Date: Wed, 22 Mar 2017 11:06:47 +0100
Errors-To: nanog-bounces@nanog.org
Hi,
> (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).
This is exactly what I've implemented yesterday on my end :).
Best regards
J=C3=BCrgen
-----Urspr=C3=BCngliche Nachricht-----
Von: Radu-Adrian Feurdean [mailto:nanog@radu-adrian.feurdean.net]=20
Gesendet: Mittwoch, 22. M=C3=A4rz 2017 11:02
An: J=C3=BCrgen Jaritsch <juergen@jaritsch.at>; Doug Porter =
<dsp@fb.com>; nanog@nanog.org
Betreff: Re: Facebook more specific via Level3 ?
On Tue, Mar 21, 2017, at 20:38, J=C3=BCrgen Jaritsch wrote:
> I understand that FB is using some type of DNS geo-loadbalancing and=20
> other mechanism to redirect users to (possibly) nearer mirrors. The=20
> used DNS is directly requesting the root DNS and not any other public=20
> DNS (e.g. not 8.8.8.8). Running some requests within 3 minutes gives=20
> me the below
> results:
>=20
> www.facebook.com =3D> star-mini.c10r.facebook.com. =3D> 31.13.77.36=20
> www.facebook.com =3D> star-mini.c10r.facebook.com. =3D> 157.240.2.35=20
> www.facebook.com =3D> star-mini.c10r.facebook.com. =3D> 31.13.93.36=20
> www.facebook.com =3D> star-mini.c10r.facebook.com. =3D> 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).
