.. _primary-node-role-in-a-cluster:

Primary Node Role in a Cluster
------------------------------


.. index:: cluster; cluster primary
.. index:: cluster; cluster primary role application
.. index:: cluster; cluster primary role database

Commands are available to determine if a node is the 
primary database or application node.

From the CLI on a node, the **cluster primary** command
can be run with additional parameters to determine
if the node is the primary database or application 
node.  

::

 platform@VOSS-UN-1:~$ cluster primary
 is_primary: true
 platform@VOSS-UN-1:~$ cluster primary role application
 is_primary: true
 platform@VOSS-UN-1:~$ cluster primary role database
 is_primary: false
 platform@VOSS-UN-1:~$


This command should be used to establish and 
confirm the primary application
node during patch, patch bundle or delta bundle installation.