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os/bluestore: put bluefs in the middle of the shared device #14873
So far on an empty system where we'd expect to see the greatest drop in performance for sequential IO, I see perhaps a small decrease in sequential read performance (maybe a couple of percent), but it's small enough it could just be noise too. No obvious difference for sequential writes. I haven't tested a full cluster yet, but the feeling I'm getting is that other factors are probably going to matter more than this does and we could probably go either way with certain advantages and disadvantages.