[neutron][ovn] ovn database backup and restore

Folks, I have OVN running on 3 node controllers with a RAFT clustering. What is the best way to take backup of all the databases of nb_db and sb_db and how to restore them during a full disaster situation? Is the following the correct way to take backup? ovsdb-client backup unix:///run/ovn/ovnnb_db.sock OVN_Northbound > nb-snap-$(date +%s).txt ovsdb-client backup unix:///run/ovn/ovnsb_db.sock OVN_Southbound > sb-snap-$(date +%s).txt During restore on what node we should restore and does restore work on fresh cluster or existing cluster? How do other folks handle disaster scenarios where all 3 nodes are down or required migration?