VMware App Volumes Specialist (2021) — Question 89

A write intensive application has been deployed recently into an All-flash 4-node vSAN cluster. Each node has one disk group with the following configuration:

• 1 x 400 GB SSD for Cache
• 4 x 3.84 TB SSD for Capacity

After the deployment, the administrator notices that the overall workload performance is degraded and observes a low-write, buffer-free percentage.

Which action should be taken to remediate this issue?

Answer options

• A. Adding a second cache disk to the existing disk group
• B. Replacing the cache disk in the existing disk group with a larger one
• C. Enabling automatic rebalance from the vSAN services advanced options
• D. Increasing the number of capacity disks in the existing disk group

Correct answer: B

Explanation

The correct answer is B because replacing the cache disk with a larger one can enhance the write performance by providing more cache space for write operations. Options A and D do not address the root cause of the performance degradation, while option C is not directly related to improving the cache performance.