On Tue, Dec 17, 2013 at 10:44 PM, Keith Turner <[email protected]> wrote:
> On Tue, Dec 17, 2013 at 11:39 PM, Josh Elser <[email protected]> wrote: > > > I was not using the correct terminology for what I was thinking, but I am > not sure what the correct terminology is. I do not want to be limited by > the memory of one machine for hdfs metadata and I want HA. So would it be > correct to say that I want to test with multiple HA nameservices? For > example test 1.6 w/ three nameservices, where each nameservice has two HA > namenodes. This would allow hdfs metadata to spread across the memory of > three machines. > > These HDFS nameservices are independent HDFS instances using the new span-HDFS-instances feature in Accumulo 1.6? Or they are nameservices using HDFS federation across HA pairs? If the former, I think the terminology would be "spanning HDFS clusters." If the latter, it's HDFS federation[1]. [1]: http://hadoop.apache.org/docs/r2.2.0/hadoop-project-dist/hadoop-hdfs/Federation.html -- Sean
