Which two actions guarantee that time is synchronized properly on all nodes in a cluster after installing Oracle Grid Infrastructure 12c? (Choose two.)
A.
Configure network time protocol (NTP) on all cluster nodes, and then start the Oracle Cluster Time Synchronization Service (CTSSD) in active mode on all cluster nodes.
B.
Configure network time protocol (NT P) on all cluster nodes; Oracle Cluster Time Synchronization Service (CTSSD) will then start automatically in observer mode when the clusterware is started.
C.
Deactivate network time protocol (NTP) on all cluster nodes; Oracle Cluster Time Synchronization Service (CTSSD) will then start automatically in active mode when the clusterware is started.
D.
If network time protocol (NT P) is not configured properly on all cluster nodes, then Oracle Cluster Time Synchronization Service (CTSSD) will start automatically in active mode when the clusterware is started.
E.
If network time protocol (NTP) time servers are unreachable on any cluster node, then Oracle CTSSD Time Synchronization Service (CTSSD) will start
Is correct BE
If you have NTP daemons on your server but you cannot configure them to synchronize time
with a time server, and you want to use Cluster Time Synchronization Service to provide
sy , y nchronization service in the cluster, you should deactivate and deinstall the NTP.
I was wrong, correct is B, C
If NTP is used, then the octssd daemon starts up in observer mode.
If NTP is not installed or is deactivated, CTSS is used and the octssd process is started in active mode.
Oracle Database 12c: Clusterware Administration 4 - 32
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