Can we have more the one active name nodes in HDP cluster?

[#1]

Hi Experts,

Can i more the 1 Active Name Node in HDP Cluster? . Prefer to have 1 Stand by Name node for multiple Active Name Node. Does this configuration is possible?

Thanks

JJ

[#2]

@Jacqualin jasmin

Are you talking about HDFS Federation ?

It is slightly different from standard NameNode HA in which one Active / one Standby NameNodes are used.

The federation uses multiple independent  Namenodes/namespaces. The Namenodes are federated; the Namenodes are independent and do not require coordination with each other. The Datanodes are used as common 
storage for blocks by all the Namenodes. Each Datanode registers with all the Namenodes in the cluster. Datanodes send periodic heartbeats and block reports. They also handle commands from the Namenodes.

Following is a good blog to go through:

https://hortonworks.com/blog/an-introduction-to-hdfs-federation/

https://hadoop.apache.org/docs/r2.7.2/hadoop-project-dist/hadoop-hdfs/Federation.html