Re: TIER: combine SSDs and HDDs into a single block device

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On Thu, Aug 02, 2012 at 04:49:11PM -0500, Mark Nelson wrote:
> I was thinking of doing that.  Is the realtime allocator a good fit
> for this kind of thing?  I think dchinner mentioned on the xfs
> mailing list last year that it's single threaded and not very well
> optimized (and maybe not production viable?)

It's generally a bit dated and bit rotting, and as Dave said doesn't
parallelize.  But for a setup where you have one OSD per disk and lots
of OSD that's not really quite as important.

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