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While testing a Fault Tolerance setup on a virtual machine, a system administrator notices that the DRS automation level of the virtual machine has been automatically set to Disabled.
The administrator needs to enable DRS to migrate the Fault Tolerance virtual machine to balance the cluster’s CPU and memory loads.
What should the administrator do?
A. Enable Enhanced vMotion Compatibility (EVC) in the vSphere cluster.
B. Move the virtual machine to a VMFS 5 datastore built on shared storage.
C. Manually change the DRS automation level of the virtual machine to Enabled.
D. Move the secondary virtual machine to a host with a Fault Tolerance VMkernel port.
Correct Answer: A
Explanation/Reference:
Explanation:
VMware DRS (Distributed Resource Scheduler) is a load balancing utility that assigns and moves computing workloads to available hardware resources in a virtualized environment.
DRS uses vMotion to move the VMs between the hosts. To be able to configure the DRS automation level, Enhanced vMotion Compatibility (EVC) must be enabled in the vSphere cluster. This is to prevent compatibility issues between hosts with different CPU capabilities (clock speed, number of cores etc.).
After EVC is enabled for a cluster in the vCenter Server inventory, all hosts in that cluster are configured to present identical CPU features and ensure CPU compatibility for vMotion.
Incorrect Answers:
B: We’re running vSphere 5.5 in a host cluster. We know we have a host cluster because that is a requirement for fault tolerance (FT). Therefore, we already have a VMFS 5 datastore built on shared storage. The problem in this question is not caused by the storage. Therefore, this answer is incorrect.
C: You cannot manually change the DRS automation level of the virtual machine to Enabled. Without Enhanced vMotion Compatibility (EVC) enabled, you will not be able to change the setting.
D: When FT is enabled, the secondary VM is created automatically on a host that meets the FT requirements. Therefore it is not necessary to move the secondary VM so this answer is incorrect.
References:
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1003212