Valid VMware Recommendations for vSAN Cluster
Question
A vSphere Administrator is tasked with implementing a production VMware vSAN cluster and has followed the design and sizing guide to correctly size the environment.
Which two requirements represent valid VMware recommendations? (Choose two.)
Answers
Explanations
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A. B. C. D.CD.
The correct answers are A and D.
A. A disk group must be composed of more than one cache disk and at least one capacity disk.
This is a valid VMware recommendation for vSAN cluster design. A disk group in vSAN is a collection of physical disks that are grouped together to form a single logical unit of storage for vSAN. Each disk group must have at least one capacity disk and at least one cache disk. The cache disk is used to accelerate read and write operations, while the capacity disk is used to store data. It is recommended to have more than one cache disk in a disk group for redundancy and performance.
B. All-Flash configurations do not require a caching tier.
This statement is incorrect. All-Flash configurations in vSAN still require a caching tier. The caching tier is used to accelerate read and write operations and improve performance. However, in an All-Flash configuration, the caching tier can be smaller than in a Hybrid configuration since the flash-based capacity tier provides faster access to data.
C. A disk group must be composed of one cache disc and at least one capacity disk.
This statement is incorrect. As mentioned earlier, a disk group must have at least one cache disk and at least one capacity disk. It is recommended to have more than one cache disk in a disk group for redundancy and performance.
D. The cache tier should be sized to no less than 10% of the capacity tier.
This is a valid VMware recommendation for vSAN cluster design. The cache tier should be sized to no less than 10% of the capacity tier for optimal performance. However, this is just a guideline and the actual size of the cache tier will depend on the workload and usage pattern of the vSAN cluster. It is important to properly size both the cache and capacity tiers to ensure optimal performance and capacity utilization.
