Exam 2V0-21.19 topic 1 question 99 discussion

Actual exam question from VMware's 2V0-21.19

Question #: 99
Topic #: 1

An administrator manages a vSphere environment with the following configuration:
✑ HA enabled
✑ Admission Control enabled based on fixed slot size
✑ 1 VM with a memory reservation significantly larger than the fixed slot size
The administrator notices that occasionally the VM with the memory reservation fails to restart during an HA host failure event.
What could cause this to happen?

A. Failover capacity is exceeded due to the memory reservation
B. vMotion network needs more bandwidth to restart the reserved VM
C. VMs with reservations must be in their own dedicated cluster
D. DRS must be enabled when admission control is enabled

Show Suggested Answer

Suggested Answer: A 🗳️

by hsezer at May 31, 2020, 12:25 p.m.

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sasaz

4 years, 10 months ago

A. Larger memory/cpu reservation will increase the slot size and triggers vSphere HA to re-calculate available slot number.

upvoted 3 times

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hsezer

5 years ago

Not fully shows the right answer but it says similar things with A. When you select Slot Policy (Powered-on VMs) Admission Control will start resources calculations and VMs slots. If you have significant VMs or big Reservation Pools, the VM slot will also be large , and could not fit in the host failure capacity (if you have 1 or 2 host failover cluster). So in our cas,e we have some large VMs (between 64 to 128Gb memory) and also some Reservations Pools for those VMs or group of VMs. Slot Policy then calculates that some reservations cannot assure that will be able to provide the reserved resources in case of host failure (not all ESXi hosts have the same CPU and Memory size).

upvoted 4 times

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