FINDOUT MATER NODE IN RAC In this post, I will demonstrate three methods to identify the oracle clusterware’s master node. Pls note that clusterware master is different from Resource master in oracle database instance. To know about how to find the resource master, pls click here : . Importance of master node in a cluster: - Master node has the least Node-id in the cluster. Node-ids are assigned to the nodes in the same order as the nodes join the cluster. Hence, normally the node which joins the cluster first is the master node. - CRSd process on the Master node is responsible to initiate the OCR backup as per the backup policy - Master node is also responsible to sync OCR cache across the nodes - CRSd process oth the master node reads from and writes to OCR on disk - In case of node eviction, The cluster is divided into two sub-clusters. The sub-cluster containing fewer no. of nodes is evicetd. But, in case both the sub-clusters have same no. of nodes, the