Hi I have a service spec for osds with the db_slots parameter set. However it's being ignored. After doing some code review, it seems to me that the reason is, that it's not implemented in translate.py - e.g. https://github.com/ceph/ceph/blob/v18.2.7/src/python-common/ceph/deployment/... (or other versions) The translate.py simply does not have translation to "--block-db-slots" that is used by the ceph-volume command as specified here https://docs.ceph.com/en/reef/ceph-volume/lvm/batch/#implicit-sizing Something along the lines of: if db_slots: cmd += " --block-db-slots {}".format(self.spec.db_slots) Should probably be added after line 119 of v.18.2.7 at least - placement will defer depending on version - Any devs in here that can confirm this? Seems like a quick fix. * found this 2y old track for it as well - https://tracker.ceph.com/issues/57939