Enabling High Availability (HA)
The Hortonworks Data Platform Standard has the option of having a High Availability HDP cluster. High Availability is ideal for a production ready environment. The following components are Highly Available when you select “Yes” from the cluster layout at Azure Portal.
HDFS (Namenodes)
YARN (Resource managers)
Hive (metastore, hiveserver2, webhcat)
Once the cluster is deployed you can also use the Ambari administration interface to enable HA post-installation, and on other services. For more information, see Managing Service High Availability in the Ambari User's Guide.