Can minimize latency impact to a production load, where token recalculation and data movement can affect performance.
Hot spots are minimized during data movement to new nodes.
For single-token clusters, adding one node at a time isn’t a great idea.
This may cause cluster to become unbalanced.
Don’t leave the cluster unbalanced.
Adding a single node creates a much more complex token generation scheme.
A token inserted between two others will leave cluster unbalanced.
Have to regenerate all tokens and move data to rebalance ring.