Oracle Database 12c: RAC Administration — Question 19

Which three statements are true concerning the behavior of an Oracle Clusterware 12c Flex Cluster in response to hub or leaf node failures? (Choose three.)

Answer options

• A. Leaf nodes evicted from a Flex Cluster always require a reboot.
• B. Hug node eviction results in the reboot of all leaf nodes that were connected to the evicted hub node.
• C. Hub nodes evicted from a Flex Cluster always require a reboot.
• D. Hub node eviction results in the eviction of all leaf nodes that were connected to the evicted hub node.
• E. Cluster Resources on a leaf node that is evicted from a Flex Cluster are relocated, if possible, to another leaf node that is connected to same hub node to which the failed leaf node was connected.
• F. Cluster Resources on a hub node that is evicted from a Flex Cluster are always relocated to a leaf node that was connected to the evicted hub node.
• G. Cluster Resources on a hub node that is evicted from a Flex Cluster are always relocated to another hub node in the cluster.

Correct answer: B, E, G

Explanation

The correct answers are B, E, and G because when a hub node is evicted, it causes the reboot of all connected leaf nodes (B), relocates resources from the evicted leaf node to another connected leaf node (E), and resources from an evicted hub node are moved to another hub node in the cluster (G). Options A and C are incorrect as they imply that evicted nodes always require a reboot, which is not the case for all scenarios, and D incorrectly states that eviction results in the eviction of leaf nodes, rather than a reboot.