Update: Issue is solved. The output of "ceph osd dump" showed that the required setting was incorrect, means require_osd_release luminous After executing ceph osd require-osd-release nautilus I can enable pg_autoscale_mode on any pool. THX Am 21.11.2019 um 13:51 schrieb Paul Emmerich: > "ceph osd dump" shows you if the flag is set > > > Paul > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com