HOW TO IDENTIFY THE MASTER NODE IN RAC 11G R2

[root@alpha cssd]# pwd

/u01/product/1120/grid_home/log/alpha/cssd

[root@alpha cssd]#

[root@alpha cssd]# cat ocssd.log | grep "master node" | tail -1
2017-12-19 22:38:54.764: [    CSSD][1238542656]clssgmCMReconfig: reconfiguration successful, incarnation 409006089 with 2 nodes, local node number 1, master node number 2

[root@alpha cssd]#