[158282] in North American Network Operators' Group
Re: "Programmers can't get IPv6 thus that is why they do not have
daemon@ATHENA.MIT.EDU (Joseph Holsten)
Tue Nov 27 16:24:30 2012
From: Joseph Holsten <joseph@josephholsten.com>
In-Reply-To: <50B52B74.4070606@unfix.org>
Date: Tue, 27 Nov 2012 21:23:55 +0000
To: Jeroen Massar <jeroen@unfix.org>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 2012-11-27, at 21:07, Jeroen Massar wrote:
> As such, if an application does not do proper IPv6 today the people in
> charge of the thing simply did not care...
Or do care.=20
=46rom http://wiki.apache.org/hadoop/HadoopIPv6:
> Apache Hadoop does not currently support IPv6 networks, it uses IPv4 =
addresses for communicating between nodes. This is because Hadoop is =
designed to work in private datacenters, which usually have private IP =
addresses in the 10.x.x.x address space.
>=20
> =95 Using IPv4 addresses everywhere provides a single form of =
TCP addressing for all our tests. Different network configurations (DNS, =
reverse DNS, DNS caching) still provide lots of problems and performance =
issues, but there is no need to worry about which IP protocol version is =
used.
> =95 Shorter addresses make for shorter packets, which can have a =
benefit on busy networks.
>=20
> This does not mean that the Hadoop team thinks that IPv4 is the best =
ever network protocol and that there is no reason to upgrade ever, only =
that it works well in datacenters.=20
(Yes, I am technically trolling. But mostly because I don't have the =
energy to fight for IPv6 any more. Maybe you do?)
--
http://josephholsten.com=
