Which setting on a virtual machine ensures it always receives the required resources during host overcommitment?

Which setting on a virtual machine ensures it always receives the required resources during host overcommitment?

• A. vSphere High Availability Admission Control
• B. High Performance Power Policy
• C. CPU and Memory Shares to High
• D. CPU and Memory Reservations

Answer: (D)

The correct choice regarding ensuring that a virtual machine consistently receives the necessary resources during host overcommitment is based on the concept of reservations in virtualized environments. Setting CPU and Memory Reservations guarantees that a specific amount of CPU and memory resources are allocated to the virtual machine, irrespective of the overall resource utilization of the host. When you configure reservations, you are essentially reserving the specified amount of resources for that virtual machine. This means that, even when the host is overcommitted—where the total allocated resources for all VMs exceed the physical resources available—the defined reservations for that VM are honored. As a result, it will always have access to the CPU and memory it needs to function properly, preventing performance degradation due to resource contention with other virtual machines on the same host. Other options, while relevant in managing resources on a host, do not provide the same strict guarantee of resource availability. High Availability Admission Control helps to determine if there are enough resources available on the host to restart virtual machines in the event of a failure, but it does not guarantee ongoing resource availability during normal operation. A High Performance Power Policy optimizes for performance but does not enforce specific resource allocation. Setting CPU and Memory Shares to High influences priority during contention but does not create a

The correct choice regarding ensuring that a virtual machine consistently receives the necessary resources during host overcommitment is based on the concept of reservations in virtualized environments. Setting CPU and Memory Reservations guarantees that a specific amount of CPU and memory resources are allocated to the virtual machine, irrespective of the overall resource utilization of the host.

When you configure reservations, you are essentially reserving the specified amount of resources for that virtual machine. This means that, even when the host is overcommitted—where the total allocated resources for all VMs exceed the physical resources available—the defined reservations for that VM are honored. As a result, it will always have access to the CPU and memory it needs to function properly, preventing performance degradation due to resource contention with other virtual machines on the same host.

Other options, while relevant in managing resources on a host, do not provide the same strict guarantee of resource availability. High Availability Admission Control helps to determine if there are enough resources available on the host to restart virtual machines in the event of a failure, but it does not guarantee ongoing resource availability during normal operation. A High Performance Power Policy optimizes for performance but does not enforce specific resource allocation. Setting CPU and Memory Shares to High influences priority during contention but does not create a