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Question 222 - NCS-Core discussion

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During the knowledge transfer on Prism GUI, a customer asked about AHV best practices for VM High Availability on a five-node cluster and the safest configuration. The consultant informed the customer that best practices dictate that all storage containers are configured with a replication factor of 3.

What will be the behavior if the non-default Guarantee mode is selected on Prism with two AHV host failures?

A.
Keeping the default mode will ensure that all VMs can restart in case of two AHV host failures.
Answers
A.
Keeping the default mode will ensure that all VMs can restart in case of two AHV host failures.
B.
Keeping the default mode will ensure that all VMs can restart in case of an AHV host failure.
Answers
B.
Keeping the default mode will ensure that all VMs can restart in case of an AHV host failure.
C.
Will ensure that all VMs can restart if two AHV nodes remains online.
Answers
C.
Will ensure that all VMs can restart if two AHV nodes remains online.
D.
Will ensure that all VMs can restart in case of two simultaneous AHV host failures.
Answers
D.
Will ensure that all VMs can restart in case of two simultaneous AHV host failures.
Suggested answer: D

Explanation:

In a five-node cluster with storage containers configured with a replication factor of 3, the behavior of VM High Availability when two AHV host failures occur with the non-default 'Guarantee mode' enabled is as follows:

Will ensure that all VMs can restart in case of two simultaneous AHV host failures: This mode prioritizes maintaining VM availability by reserving enough resources to restart VMs even with multiple host failures, as long as at least three hosts (matching the replication factor) remain functional.

Nutanix Bible (https://www.nutanixbible.com), specifically sections on VM High Availability and replication factors.

Nutanix University: NCS-Core 6.8 Training (https://university.nutanix.com), where best practices for VM High Availability are detailed.

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asked 23/09/2024
Muhammad Imran Khan
35 questions
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