Hello, i have from the beginning on one DC very old crush map rules, to split HDD and SSD disks. It is obsolete since Luminous and I want to drop them: # ceph osd crush rule ls replicated_rule fc-r02-ssdpool fc-r02-satapool fc-r02-ssd ================= [ { "rule_id": 0, "rule_name": "replicated_rule", "ruleset": 0, "type": 1, "min_size": 1, "max_size": 10, "steps": [ { "op": "take", "item": -1, "item_name": "default" }, { "op": "chooseleaf_firstn", "num": 0, "type": "host" }, { "op": "emit" } ] }, { "rule_id": 1, "rule_name": "fc-r02-ssdpool", "ruleset": 1, "type": 1, "min_size": 1, "max_size": 10, "steps": [ { "op": "take", "item": -15, "item_name": "r02-ssds" }, { "op": "chooseleaf_firstn", "num": 0, "type": "host" }, { "op": "emit" } ] }, { "rule_id": 2, "rule_name": "fc-r02-satapool", "ruleset": 2, "type": 1, "min_size": 1, "max_size": 10, "steps": [ { "op": "take", "item": -16, "item_name": "r02-sata" }, { "op": "chooseleaf_firstn", "num": 0, "type": "host" }, { "op": "emit" } ] }, { "rule_id": 3, "rule_name": "fc-r02-ssd", "ruleset": 3, "type": 1, "min_size": 1, "max_size": 10, "steps": [ { "op": "take", "item": -4, "item_name": "default~ssd" }, { "op": "chooseleaf_firstn", "num": 0, "type": "host" }, { "op": "emit" } ] } ] ========================== # ceph osd tree ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF -14 0 root sata -18 0 datacenter fc-sata -16 0 rack r02-sata -13 18.55234 root ssds -17 18.55234 datacenter fc-ssds -15 18.55234 rack r02-ssds -6 3.09206 host fc-r02-ceph-osd-01 41 nvme 0.36388 osd.41 up 1.00000 1.00000 0 ssd 0.45470 osd.0 up 1.00000 1.00000 1 ssd 0.45470 osd.1 up 1.00000 1.00000 2 ssd 0.45470 osd.2 up 1.00000 1.00000 3 ssd 0.45470 osd.3 up 1.00000 1.00000 4 ssd 0.45470 osd.4 up 1.00000 1.00000 5 ssd 0.45470 osd.5 up 1.00000 1.00000 -2 3.09206 host fc-r02-ceph-osd-02 36 nvme 0.36388 osd.36 up 1.00000 1.00000 6 ssd 0.45470 osd.6 up 1.00000 1.00000 7 ssd 0.45470 osd.7 up 1.00000 1.00000 8 ssd 0.45470 osd.8 up 1.00000 1.00000 9 ssd 0.45470 osd.9 up 1.00000 1.00000 10 ssd 0.45470 osd.10 up 1.00000 1.00000 29 ssd 0.45470 osd.29 up 1.00000 1.00000 -5 3.45593 host fc-r02-ceph-osd-03 38 nvme 0.36388 osd.38 up 1.00000 1.00000 40 nvme 0.36388 osd.40 up 1.00000 1.00000 11 ssd 0.45470 osd.11 up 1.00000 1.00000 12 ssd 0.45470 osd.12 up 1.00000 1.00000 13 ssd 0.45470 osd.13 up 1.00000 1.00000 14 ssd 0.45470 osd.14 up 1.00000 1.00000 15 ssd 0.45470 osd.15 up 1.00000 1.00000 16 ssd 0.45470 osd.16 up 1.00000 1.00000 -9 3.09206 host fc-r02-ceph-osd-04 37 nvme 0.36388 osd.37 up 1.00000 1.00000 30 ssd 0.45470 osd.30 up 1.00000 1.00000 31 ssd 0.45470 osd.31 up 1.00000 1.00000 32 ssd 0.45470 osd.32 up 1.00000 1.00000 33 ssd 0.45470 osd.33 up 1.00000 1.00000 34 ssd 0.45470 osd.34 up 1.00000 1.00000 35 ssd 0.45470 osd.35 up 1.00000 1.00000 -11 2.72818 host fc-r02-ceph-osd-05 17 ssd 0.45470 osd.17 up 1.00000 1.00000 18 ssd 0.45470 osd.18 up 1.00000 1.00000 19 ssd 0.45470 osd.19 up 1.00000 1.00000 20 ssd 0.45470 osd.20 up 1.00000 1.00000 21 ssd 0.45470 osd.21 up 1.00000 1.00000 22 ssd 0.45470 osd.22 up 1.00000 1.00000 -25 3.09206 host fc-r02-ceph-osd-06 39 nvme 0.36388 osd.39 up 1.00000 1.00000 23 ssd 0.45470 osd.23 up 1.00000 1.00000 24 ssd 0.45470 osd.24 up 1.00000 1.00000 25 ssd 0.45470 osd.25 up 1.00000 1.00000 26 ssd 0.45470 osd.26 up 1.00000 1.00000 27 ssd 0.45470 osd.27 up 1.00000 1.00000 28 ssd 0.45470 osd.28 up 1.00000 1.00000 -1 0 root default =================================================== the question is now: what is the best way, to drop them and use the defaults from Ceph. Any suggestions ? cu denny