In this post, I will demonstrate three methods to identify the oracle clusterware’s master node. Please note that clusterware master is different from Resource master in oracle database instance. To know about how to find the resource master,

Oracle ClusterWare Master’s  Node information can be found 

  • By scanning ocssd logs from various nodes
  • By scanning  crsd logs from various nodes.
  • By identifying the node which  takes the backup of the OCR.

1st Method

2nd Method

If I take the OCR backup right now, it will be taken by node3 (master node).

3rd Method

4th Method in 12c


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