2V0-21.23 Question 308
Single answerA VMware administrator is managing a cluster where two virtual machines (VM1 and VM2) are running on the same host. The administrator observes that VM1 is consuming a significant amount of CPU resources, causing performance degradation for VM2. To ensure VM2 has guaranteed access to a minimum amount of CPU resources during contention, what should the administrator configure?
- A
Set a reservation for VM2.
- B
Set a CPU limit for VM1.
- C
Increase the CPU shares for VM2.
- D
Decrease the CPU shares for VM1.
Show answer and explanation
Correct answer: A
Explanation
In a VMware environment, reservations are used to guarantee a minimum amount of resources for a virtual machine. In this scenario, setting a reservation for VM2 ensures that it will always have access to the specified amount of CPU resources, even during periods of contention caused by VM1. While shares and limits influence resource allocation priorities and maximum usage, they do not provide a guaranteed minimum like reservations do.
- A. Correct.
Correct. Setting a reservation for VM2 ensures it receives a guaranteed minimum amount of CPU resources during resource contention, regardless of VM1's resource demands.
- B. Incorrect.
Incorrect. Setting a CPU limit for VM1 restricts its maximum CPU usage but does not guarantee resources for VM2. VM2 could still suffer from resource contention.
- C. Incorrect.
Incorrect. Increasing CPU shares for VM2 makes it a higher priority for CPU resources, but it does not guarantee a specific amount of resources during contention.
- D. Incorrect.
Incorrect. Decreasing the CPU shares for VM1 reduces its priority, but this still does not guarantee VM2 will have a minimum amount of resources during contention.