单选题An administrator has made several topology and resource group changes on one node in a running cluster.During verification and synchronization， using the "Emulate" option， many errors are reported. Theadministrator decided the best course of action was to roll back the changes. Prior to the changes beingmade， a cluster snapshot was taken. Which of the following actions will roll back the changes with the least disruption？（）APerform a synchronization from a node without the changes.BApply the cluster snapshot on both nodes while the cluster is running.CRestore HACMP Configuration Database from Active Configuration on the node where the changes weremadeDStop the cluster using the option Unmanage Resource Groups and apply the cluster snapshot on thenode where the changes were made
单选题
An administrator has made several topology and resource group changes on one node in a running cluster.During verification and synchronization， using the "Emulate" option， many errors are reported. Theadministrator decided the best course of action was to roll back the changes. Prior to the changes beingmade， a cluster snapshot was taken. Which of the following actions will roll back the changes with the least disruption？（）
A
Perform a synchronization from a node without the changes.
B
Apply the cluster snapshot on both nodes while the cluster is running.
C
Restore HACMP Configuration Database from Active Configuration on the node where the changes weremade
D
Stop the cluster using the option Unmanage Resource Groups and apply the cluster snapshot on thenode where the changes were made
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单选题One service IP label and one volume group are assigned to a resource group in a cluster. An Additional service IP label and volume group need to be added to the resource group. How can this be done with the minimum disruption of the cluster？（）A Make the changes in HACMP and synchronize the cluster.B It cannot， because changes like this cannot be made while the cluster is running.C Make the changes in HACMP and wait until the next failure for the changes to take affect.D Use the forced option to stop the cluster，make the changes，and restart cluster services.
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单选题The IP subsystem fallover behavior of a two-node cluster is being testing in a large client organization. One of the tests is to simulate a network_down event and verify that HACMP movesthe single resource group to the standby node. What is the best way to simulate a network down condition？（）A Turn off the IP core switch connecting the two nodes.B Issue the command stopsrc -g inetd on the node that has the resource group.C Issue the command sh /etc/rc.tcpclean on the node that has the resource group.D Simultaneously unplug all network cables from the node that has the resource group.