On Dec 18, 2013 12:00 AM, "Keith Turner" <[email protected]> wrote: > > On Tue, Dec 17, 2013 at 11:52 PM, Sean Busbey <[email protected] >wrote: > > > 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? > > > > HDFS federation across HA pairs, describes what I am thinking. I did want > the HA pairs to share datanodes as Ravi mentioned. So I would like to test > w/ 2 or more federated HA pairs. > >
Yeah, that's a supported configuration of HDFS federation with HA. HDFS Federation always shares datanodes. I've done some testing on earlier versions with HA as Josh described. Nothing with Federation yet.
