2V0-21.23 Question 385
Single answerAn administrator is tasked with configuring a VMware vSphere environment to ensure that critical workloads remain available during a host failure. The cluster has three ESXi hosts, and the administrator has enabled vSphere High Availability (HA). They need to determine the appropriate admission control policy to guarantee sufficient resources are reserved for failover. Which admission control policy would best meet this requirement?
- A
Host Failures Cluster Tolerates
- B
Dedicated Failover Hosts
- C
Percentage of Cluster Resources Reserved
- D
Disable Admission Control
Show answer and explanation
Correct answer: A
Explanation
The 'Host Failures Cluster Tolerates' policy is the most suitable option because it directly aligns with the requirement to ensure critical workloads remain available during a specified number of host failures. It simplifies failover resource calculations by automating the reservation process based on the cluster configuration and the number of tolerable host failures.
- A. Correct.
This policy allows the administrator to specify the number of host failures the cluster can tolerate. It automatically calculates and reserves resources proportionate to the specified number of host failures, ensuring critical workloads remain available during a failure.
- B. Incorrect.
This policy designates specific hosts in the cluster as failover hosts. However, this approach may not efficiently utilize resources and is not the best fit for most environments.
- C. Incorrect.
This policy reserves a percentage of total cluster resources for failover. While flexible, it requires manual adjustment and may not always align with the exact number of host failures the cluster must tolerate.
- D. Incorrect.
Disabling Admission Control removes resource reservation for failover, which does not meet the requirement to ensure critical workloads remain available during a host failure.