gcomstar
Contributor
Contributor

Cache Tier in all flash still required?

From the latest docs ive read i get the sense this is still required, and would function as a write cache only.  If i have 3 PCIE SSDs in each host, each capable of about 8000Mbps read and 3000 Write, I am put off by the concept of adding a single caching drive, even if optane for writes. The hosts will be connected 100gb ethernet. 

 

Is the caching tier still required? It seems to only hurt write performance in this scenario. Is it still required and am i missing something?

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4 Replies
CyberNils
Enthusiast
Enthusiast

Yes, it is still required.

 

 



Nils Kristiansen
https://cybernils.net/
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gcomstar
Contributor
Contributor

Bummer, it also looks like pmem 200 modules are not supported for vsan caching tier. this solution seems disappointing still.

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depping
Leadership
Leadership

Yes, unfortunately. As mentioned during VMworld, a new architecture where a caching layer is not needed is considered for future release of vSAN. When/If that will be available is something I cannot comment on.

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gcomstar
Contributor
Contributor

Ok thank you

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