VMware vSphere 7.x Professional for Service Providers — Question 21

An appliance owner complains about poor performance on a VM named APPVM01. Troubleshooting indicates that another VM named DBVM01 on the same datastore is saturating the volume with I/O requests.
Which two actions can be taken to reduce DBVM01 impact on APPVM01, while still prioritizing DBVM01 disk I/O? (Choose two.)

Answer options

• A. Enable Network I/O Control on the cluster containing APPVM01 and DBVM01.
• B. Enable Storage I/O Control on the cluster containing APPVM01 and DBVM01.
• C. Enable Storage I/O Control on the datastore containing APPVM01 and DBVM01.
• D. Configure APPVM01 with a shares limit of Low, and DBVM01 with a shares limit of Normal.
• E. Configure APPVM01 with a shares limit of High, and DBVM01 with a shares limit of Normal.

Correct answer: C, E

Explanation

Enabling Storage I/O Control on the datastore containing APPVM01 and DBVM01 (option C) allows for better management of I/O resources among VMs, ensuring that APPVM01 receives sufficient I/O even when DBVM01 is busy. Setting APPVM01 with a shares limit of High and DBVM01 with Normal (option E) ensures that APPVM01 gets prioritized over DBVM01, while still allowing DBVM01 to function effectively. The other options do not provide the necessary prioritization and control needed for this scenario.