I've done some investigation on how to move nodes across allocators and I find it very limited in terms of options where a node can be moved to. Please correct me if I'm wrong. I have the following ECE topology:
Zone A - allocator 1
Zone B - allocator 2
Zone C - allocator 3 + allocator 4
For a cluster having nodes in all 3 zones, it's possible to move ELS node only inside Zone C as this is the only one having two allocators. I can't move a node from allocator 1 to allocator 4 since the deployment specifies that nodes must be in 3 zones, and a node in Zone A can't be moved out to another zone, because it would lead to a cluster having two zones only.
Does it mean that a small ECE installation with only 3 nodes and clusters having nodes in all 3 zones effectively can't use this feature at all? Actually, any ECE installation would have to have at least two allocators per zone in this case. Is that correct?