-> $ ceph osd crush rule dump [ { "rule_id": 0, "rule_name": "replicated_rule", "type": 1, "steps": [ { "op": "take", "item": -1, "item_name": "default" }, { "op": "chooseleaf_firstn", "num": 0, "type": "host" }, { "op": "emit" } ] }, { "rule_id": 2, "rule_name": "replicated_rule_MONERO", "type": 1, "steps": [ { "op": "take", "item": -16, "item_name": "default~MONERO" }, { "op": "chooseleaf_firstn", "num": 0, "type": "host" }, { "op": "emit" } ] } ] -> $ ceph osd crush class ls [ "MONERO" ]