Helllo, I've reviewed some recent posts in this list and also searched Google for info about autoscale and overlapping roots. In what I have found I do not see anything that I can understand regarding how to fix the issue - probably because I don't deal with Crush on a regular basis. My particulars: I have an up-to-date Reef cluster in production with some EC pools and some replicated pools. My error messages look like: pool default.rgw.buckets.data won't scale due to overlapping roots: {-1, -2} From what I read and looking at 'ceph osd crush rule dump', it looks like the 8 replicated pools have "op": "take", "item": -1, "item_name": "default" whereas the 2 EC pools have "op": "take", "item": -2, "item_name": "default~hdd" To be sure, all of my OSDs are identical - HDD with SSD WAL/DB. Please advise on how to fix this. Thanks. -Dave -- Dave Hall Binghamton University kdhall@binghamton.edu