Storage Policy Change Impact on vSAN Datastore Objects
Question
An architect has been asked to plan the impact of a storage policy change to one of the production All-Flash based vSAN datastores.
The change will reduce the failures to tolerate value from 2 to 1 for objects with a RAID-1 (Mirroring) layout in the existing policy.
This change will be applied to multiple VMs.
Which statement is correct in this scenario?
Answers
Explanations
Click on the arrows to vote for the correct answer
A. B. C. D.D.
Sure, I'll do my best to provide a detailed explanation for each answer option.
A. FTT-2 requires another change to apply a RAID-6 configuration: This answer option is incorrect as it introduces an unrelated change to the storage policy. The original question only mentions reducing the failures to tolerate value from 2 to 1 for objects with a RAID-1 layout. RAID-6 is not mentioned in the scenario, so this answer option can be ruled out.
B. The policy will need to be recreated and applied with an additional tag: This answer option is also incorrect. Although adding a tag may be necessary in certain cases, it is not required in this scenario. The question only mentions reducing the FTT value from 2 to 1 for objects with a RAID-1 layout in the existing policy. It does not mention creating a new policy or adding a tag to the existing policy.
C. There will be no objects rebuilt that impact performance: This answer option is incorrect as well. When a storage policy change is made that affects the protection level of existing objects (such as reducing the FTT value), vSAN will initiate a rebuild of those objects to ensure that the new protection level is met. Depending on the size and number of objects being rebuilt, this can impact performance. Therefore, this answer option can be ruled out.
D. There will be an object rebuild impact on performance: This answer option is correct. As mentioned earlier, when a storage policy change is made that affects the protection level of existing objects, vSAN will initiate a rebuild of those objects to ensure that the new protection level is met. Depending on the size and number of objects being rebuilt, this can impact performance. In this scenario, multiple VMs will be affected by the storage policy change, so there is likely to be an impact on performance. Therefore, this answer option is the correct one.
In summary, the correct answer to the question is D - there will be an object rebuild impact on performance.
