[ceph-users] Renaming a ceph node

Can anyone please point me at a doc that explains the most efficient procedure to rename a ceph node WITHOUT causing a massive misplaced objects churn? When my node came up with a new name, it properly joined the cluster and owned the OSDs, but the original node with no devices remained. I expect this affected the crush map such that a large qty of objects got reshuffled. I want no object movement, if possible. BTW this old cluster is on luminous. ☹