Oracle Database 12c: RAC Administration — Question 15

Which two actions guarantee that time is synchronized properly on all nodes in a cluster after installing Oracle Grid Infrastructure 12c? (Choose two.)

Answer options

• 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

Correct answer: A, E

Explanation

Answer A is correct as it directly addresses the need to configure NTP and activate CTSSD in active mode for synchronization. Answer E is also correct because it highlights that CTSSD will start if NTP servers are unreachable, ensuring time synchronization is maintained under those circumstances. The other options either suggest incorrect configurations or do not guarantee proper synchronization.