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

To mitigate negatively impacting storage activity on an ESXi host, which action is most appropriate?

1. Enable Storage IO Control.

2. Configure Storage DRS.

3. Enable the Dynamic Queue Depth Throttling option.

4. Configure the Disk.SchedNumReqOutstanding parameter.

The correct answer is: Enable Storage IO Control.

Enabling Storage IO Control is the most appropriate action to mitigate negative impacts on storage activity on an ESXi host because it actively manages and prioritizes storage I/O among virtual machines. Storage IO Control provides the ability to allocate and ensure a fair amount of storage resources to each VM based on defined priorities and Share-based resource allocation. This means that when the storage subsystem becomes congested, Storage IO Control can throttle the I/O for virtual machines that are less critical, giving priority to those that require immediate access to storage resources. By implementing this feature, administrators can effectively manage the workload and ensure that important applications maintain performance even during heavy load times, thereby improving overall resource utilization on the host and enhancing performance. In contrast, while configuring Storage DRS can assist in managing storage workloads by balancing I/O load across multiple datastores, it does not directly prioritize I/O at the ESXi host level in the same way Storage IO Control does. Dynamic Queue Depth Throttling allows for adjusting the queue depth dynamically but may not address the overall management of competing I/O from multiple VMs. Finally, adjusting the Disk.SchedNumReqOutstanding parameter controls the number of outstanding I/O requests from virtual machines but requires a deeper understanding of the specific workloads and can