How to find out the master node ?

How to find out the nodes in RAC cluster (or) 
How to find out the master node in Oracle RAC?

There are several ways to find out which is the master node or all the nodes which are part of Oracle RAC cluster.

Use any one of the below.

i) oclumon manage -get master        (in Oracle RAC 12c)


ii) select MASTER_NODE from v$ges_resource;

iii) ocrconfig -manualbackup


iv) check ocssd.log file and search for "master node number".

$ grep "master node number" /u01/app/crs/11.2.0.4/log/`hostname -s`/cssd/ocssd.log




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