2V0-21.23 Question 386
Single answerAn administrator is tasked with optimizing storage performance for a VMware vSphere environment that uses an all-flash storage array. The administrator notices that a datastore used by several virtual machines has high latency. After analyzing the environment, the administrator decides to configure a Storage Policy-Based Management (SPBM) policy to address the issue. Which configuration step should the administrator take to resolve the performance problem?
- A
Assign a storage policy with 'Thick Provisioned' object space reservation to the datastore.
- B
Enable I/O Control (IOC) on the datastore and set latency thresholds.
- C
Create and assign a storage policy with 'RAID 1 (Mirroring)' as the Failure Tolerance Method.
- D
Configure the storage policy to enable deduplication and compression for the datastore.
Show answer and explanation
Correct answer: C
Explanation
In an all-flash storage array, using RAID 1 (Mirroring) as the Failure Tolerance Method in a storage policy helps to optimize performance by improving read speeds. Other options, such as thick provisioning, enabling IOC, or enabling deduplication and compression, do not directly address the latency issue or may even increase it. By assigning the correct storage policy with RAID 1, the administrator can effectively address the observed latency.
- A. Incorrect.
Thick provisioning ensures storage space is reserved in advance but does not directly address performance issues related to latency. This option is not relevant in this scenario.
- B. Incorrect.
Enabling I/O Control (IOC) can help manage contention during high I/O demand but does not resolve the underlying storage latency issue caused by the storage configuration.
- C. Correct.
Using a RAID 1 (Mirroring) failure tolerance method improves performance by providing faster read operations, as data is read from two mirrored copies. This is the correct approach for addressing latency in an all-flash array.
- D. Incorrect.
While deduplication and compression can save storage space, enabling these features can add overhead to the storage array and may increase latency, especially in high I/O environments. This is not the correct choice for resolving performance issues.