Hi,
We have six osd machines, each containing 6x4TB HDDs plus one nvme for
rocksdb. I need to plan upgrading these machines to all or partial SSDs.
The question I have is:
I know that ceph recognises SSDs as distinct from HDDs from their
physical device ids etc. In a setup with 50/50 HDDs/SSDs does ceph do
anything natively to distinguish between the two speeds of storage? I.e
do you need to create separate pools for fast/slow storage or is there
something 'under the hood' which will manage which requests are sent to
which type of storage?
Thanks in advance.
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