OSD Service Advanced Specification db_slots

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I recently upgraded my existing cluster to Pacific and cephadm, and need to reconfigure all the (rotational) OSDs to use NVMe drives for db storage.  I think I have a reasonably good idea how that's going to work, but the use of db_slots and limit in the OSD service specification have me scratching my head.

Question 1:  Does db_slots actually work in the latest version of Pacific?  It's listed here https://docs.ceph.com/en/pacific/cephadm/osd/#additional-options but in the advanced case section https://docs.ceph.com/en/pacific/cephadm/osd/#the-advanced-case there's still a note saying it's not implemented.

Question 2:  If db_slots still *doesn't* work, is there a coherent way to divide up a solid state DB drive for use by a bunch of OSDs when the OSDs may not all be created in one go?  At first I thought it was related to limit, but re-reading the advanced specification for a 4th time, I don't think that's the case.  Of course this question is moot if db_slots actually works.

Any advice or information would be appreciated.

-----
Edward Huyer
Golisano College of Computing and Information Sciences
Rochester Institute of Technology
Golisano 70-2373
152 Lomb Memorial Drive
Rochester, NY 14623
585-475-6651
erhvks@xxxxxxx<mailto:erhvks@xxxxxxx>

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