You want to install a database patch on your eight-node cluster by using OPatch with the minimum amount of down time to your cluster nodes.
You have already been prompted for the first set of nodes and you replied with node names RACNODE1, RACNODE2, and RACNODE3.
Which two statements are true about the procedure for minimizing down time?
A. The patch must be propagated to, applied, and the inventory updated on all the remaining nodes before restarting the instances on the first set of nodes.
B. When the first set of nodes has been patched, the instances on the remaining nodes are shutdown automatically by OPatch.
C. The instances must be started on the first set of nodes and then stopped on the remaining set to make certain that some nodes are always available.
D. When the first set of nodes has been patched, the administrator is prompted to shut down the instances on the remaining nodes.
E. The patch must be propagated to and the inventory updated on all the remaining nodes before restarting the instances on the first set of nodes.
Correct Answer: DE
Explanation/Reference:
Installing a Patch with Minimum Down Time with OPatch
In minimum down-time patching, the nodes are divided into two sets. One set of nodes is shut down and the patch is applied to those nodes. After the first set of nodes has been patched, the second set of nodes is shut down. The first set of nodes is then restarted and the patch is applied to the second set of nodes. After the patch has been applied to the second set of nodes, those nodes are restarted. This method leads to less down time for Oracle RAC, compared to having all the nodes shut down at the same time. When you use the minimum down-time patching method, the following actions occur:
The local node is always patched first.
The local node is used as a base to patch the other nodes.
The user is prompted for the first set of nodes to patch.
For each node in this first set, the user is asked to stop the instance and then the patch is propagated and applied to that node before continuing to the next node.
When the first set of nodes has been patched, the user is asked to shut down Clusterware on the remaining nodes.
The instances are stopped on the last set of remote nodes.
The patch is propagated to the last set of nodes and the inventory is updated.
You can then start up the patched nodes (the first set of nodes) before patching the remaining nodes.
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