A vSphere cluster has the following configuration: • Virtual machines (VMs) are running Production and Test workloads • vSphere Distributed Resource…

To address the issue, the administrator must first segregate the different workloads to manage their resources independently. Creating sibling resource pools—one for Production and one for Test—is the standard method for partitioning cluster resources for different service levels. Once the workloads are separated, the administrator can guarantee memory for the Production VMs. A memory reservation provides a guaranteed minimum amount of physical RAM to a resource pool or virtual machine, even during periods of high contention. Setting a reservation on the Production resource pool ensures its VMs receive their required memory, fulfilling the requirement.

A. Shares define relative priority for resources during contention but do not provide a hard guarantee of a specific memory amount.
C. This is imprecise. The correct approach is to create sibling pools for each workload, not just a single "parent" pool for one.
E. Placing the Test VMs in a child resource pool under the Production pool is an incorrect hierarchy for separating peer workloads.

1. VMware vSphere Documentation

"vSphere Resource Management

" for vSphere 8.0

Chapter 3

"Resource Allocation Settings

" Section: "Reservations."

This section states: "A reservation specifies the guaranteed minimum allocation for a virtual machine... The server allows you to power on a virtual machine only if there are enough unreserved resources to satisfy the reservation of the virtual machine." This confirms that reservations are the mechanism for guaranteeing resources.

2. VMware vSphere Documentation

"vSphere Resource Management

" for vSphere 8.0

Chapter 2

"Managing Resource Pools

" Section: "Create a Resource Pool."

The documentation explains: "Resource pools can be grouped into hierarchies. You can create a resource pool as a child of a host

cluster

or another resource pool." The common use case described is creating sibling pools under a cluster to isolate different business units or

in this case

workload types (Production vs. Test).

3. VMware vSphere: Install

Configure

Manage [V8] - Official Courseware

Module 10: "Using Resource Pools."

This courseware details the best practice of creating sibling resource pools to manage resources for different classes of service. It explicitly contrasts shares (for priority) with reservations (for guarantees)

stating that reservations are used to ensure that critical virtual machines always have sufficient memory.