2V0-21.23 Question 36
Single answerAn administrator is managing a vSphere environment with multiple virtual machines running on a shared datastore. During peak workload times, the administrator observes that critical database virtual machines are experiencing storage performance degradation due to contention with less critical workloads. How can the administrator use Storage I/O Control (SIOC) to prioritize storage resources for critical workloads?
- A
Enable Storage I/O Control on the datastore and configure shares for the critical virtual machines.
- B
Increase the size of the datastore to reduce contention during peak times.
- C
Enable Storage I/O Control on the datastore and set a latency threshold that applies to all workloads.
- D
Use VMFS snapshots to improve storage performance for the critical virtual machines.
Show answer and explanation
Correct answer: A
Explanation
Storage I/O Control (SIOC) is a feature in VMware vSphere that allows administrators to manage and prioritize I/O resources on shared datastores during contention. By enabling SIOC and configuring shares for critical virtual machines, the administrator can ensure that these workloads receive higher priority access to storage resources during periods of increased demand. This is a more targeted approach compared to increasing datastore size or setting general latency thresholds.
- A. Correct.
Correct. Enabling Storage I/O Control on the datastore and configuring shares for critical virtual machines allows the administrator to prioritize storage resources during contention, ensuring critical workloads receive higher priority.
- B. Incorrect.
Incorrect. Increasing the size of the datastore may provide additional capacity but does not address contention issues or prioritize workloads during high-demand periods.
- C. Incorrect.
Incorrect. While enabling Storage I/O Control and setting a latency threshold can help manage contention, it does not prioritize specific workloads. Shares need to be configured for workload prioritization.
- D. Incorrect.
Incorrect. VMFS snapshots are used for backup or recovery purposes and do not directly improve storage performance for virtual machines.