Hello, I was wondering if there is any (recent, in general) method to merge to clusters. We have several older nautilus based clusters that are natively deployed. We also have several newer rook/kubernetes/squid based clusters. In each data center we have both, alongside each other. While the clusters are running in separate networks, we could open the firewalls between them for a merge/migration. My question is, is there any reasonable way of merging an old nautilus cluster into another existing squid cluster? In theory, what would be amazing is something like a fluid process in which the newer cluster could retrieve items from the older cluster and once it has them, decommission them from the old cluster. The live migration on https://docs.ceph.com/en/latest/rbd/rbd-live-migration/ seems to go a bit into the direction, but I am not sure if that works in our case. We are looking at migrating around 500 rbd images in total. Any hints appreciated! Best regards, Nico -- Sustainable and modern Infrastructures by ungleich.ch