Is there a way to configure 'n' hosts as namenode in ambari?

[#1]

@Aman Poonia - Can you please elaborate your question? are you trying to say - can we configure 'n' number of nodes as namenode in ambari?

[#2]

@Kuldeep Kulkarni - I am talking about having more than 2 namenodes. Where we can have more than 1 standby namenodes as stated in HDFS-6440 .

[#3 · Accepted solution]

@Aman Poonia

Yes. You can. It is called Name Node Federation: https://hadoop.apache.org/docs/r2.7.2/hadoop-project-dist/hadoop-hdfs/Federation.html. However, Ambari does not support it: https://issues.apache.org/jira/browse/AMBARI-10982

If response is helpful, pls vote/accept.

[#4]

Thanks @Constantin Stanca. That's what i was looking for.

[#5]

@Aman Poonia

I think what you are asking for is N+2 redundancy for namenode. This feature will be available in Hadoop 3.0. It would allow 3-5 name ndoes. Please see the following Jira.

https://issues.apache.org/jira/browse/HDFS-6440

[#6]

Yes, you are right. I was trying to setup 3 name node and i couldn't find a way to do that in Ambari. It is in Hadoop 3.0Alpha.