I get digests, so please forgive me if this has been covered already. > Assuming production level, we would keep a pretty close 1:2 SSD:HDD ratio, 1:4-5 is common but depends on your needs and the devices in question, ie. assuming LFF drives and that you aren’t using crummy journals. > First of all, is this even a valid architecture decision? Inktank described it to me back in 2014/2015 so I don’t think it’s ultra outré. It does sound like a lot of work to maintain, especially when components get replaced or added. > it should boost performance levels considerably compared to spinning disks, Performance in which sense? I would expect it to boost read performance but not so much writes. I haven’t used cache tiering so can’t comment on the relative merits. Your local workload may be a factor. — aad _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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