share the same namespace in 2 YARN instances?

[xeonmailinglist]

Hi,

I was reading about Federation of HDFS, which is possible in YARN 
(http://www.devx.com/opensource/enhance-existing-hdfs-architecture-with-hadoop-federation.html), 
and  I started to wonder if is it possible to have 2 YARN runtimes that 
share the same HDFS namespace?

Thanks,