What is the purpose of the cache tier in an all-flash vSAN cluster?

The correct answer is D. Write caching only. Since there is no read cache in all-flash vSAN clusters, the I/O flow is subtlety different when compared to a read operation on hybrid configurations. On an all-flash vSAN, when a read is issued, the write buffer is first checked to see if the block is present References:

Architecture and Technologies

Question

Options

ARead caching only.
B30% write caching and 70% read caching.
C20% write caching and 70% read caching and 10% checksum metadata.
DWrite caching only.

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(29 responses)

A
10% (3)
B
3% (1)
C
14% (4)
D
72% (21)

Explanation

Since there is no read cache in all-flash vSAN clusters, the I/O flow is subtlety different when compared to a read operation on hybrid configurations. On an all-flash vSAN, when a read is issued, the write buffer is first checked to see if the block is present References:

Topics

#cache tier#all-flash#write caching#vSAN performance

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