VMware Certified Professional - Data Center Virtualization (VCP-DCV) Practice Exam

To prevent a priority virtual machine from migrating to other hosts in a vSphere DRS cluster, which step should an administrator take?

1. Set VM Overrides to Partially Automated.

2. Set VM Overrides to Manual.

3. Configure a VM/Host Rule with 'Must run on hosts in group.'

4. Configure a VM/Host Rule with 'Should run on hosts in group.'

The correct answer is: Set VM Overrides to Manual.

The correct answer is to set VM Overrides to Manual. When an administrator sets the VM Overrides to Manual for a priority virtual machine, they are effectively ensuring that DRS does not automatically move that VM to another host in the vSphere cluster. In Manual mode, the administrator retains full control over the allocation and placement of that VM, allowing them to decide whether to keep it on its current host or migrate it elsewhere, if needed. This approach is particularly useful for critical workloads that require consistent performance and resources, preventing any unintended migrations that could affect their operation. It allows the administrator to bypass the automatic behavior of DRS that typically aims to optimize resource usage across the cluster. In contrast, the other options would not provide the same level of control. Setting VM Overrides to Partially Automated would still allow DRS to make recommendations or even perform migrations based on load balancing needs, whereas a Manual setting strictly avoids automated actions. Configuring VM/Host rules with "Must run on hosts in group" or "Should run on hosts in group" would influence where the VM can run but would not prevent it from being moved if conditions allowed for it by DRS, making them less suitable for ensuring the VM remains on a designated host.