min_size & hybrid OSD latency

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Hi,

I would like some information about the following

Let say I have a running cluster, with 4 OSDs: 2 SSDs, and 2 HDDs
My single pool has size=3, min_size=2

For a write-only pattern, I thought I would get SSDs performance level,
because the write would be acked as soon as min_size OSDs acked

But I am right ?

(the same setup could involve some high latency OSDs, in the case of
country-level cluster)
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