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. From 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. > > • 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. > • Shorter addresses make for shorter packets, which can have a benefit > on busy networks. > > 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. (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
