Below are different ways to know the RAC cluster name,
1. The command “cemutlo” provides cluster name and version.
$GI_HOME/bin/cemutlo [-n] [-w]
[oracle@rac1 ~]$ cemutlo -n
sami-rac-scan <—– This is the Cluster name.
2. $CRS_HOME/cdata/<cluster_name> directory
3. ocrdump
which will create a text file called OCRDUMPFILE open that file and look for this entry
+[SYSTEM.css.clustername]+ ORATEXT : crs_cluster In this case, “crs_cluster” is the cluster name.
4. gpnptool get
search for keyword “ClusterName”
5. ASM SP File location
[root@rac1 ]# gpnptool getpval -asm_spf (or) SQL> show parameter spfile
+DATA/<clusterName>/asmparameterfile/registry.253.783619900
Note: We cannot change the cluster name.
The only way to change the cluster name is to reinstall the Clusterware and provide a new name to the cluster.
