In message <84f8debc-c754-4d06-99b0-405cc8a35...@josephholsten.com>, Joseph Hol sten writes: > 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?)
Most of which is just FUD. Mark -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org
