Modern Database Demo: How to achieve horizontal scale

In this demo, Cockroach Labs co-founder and CEO Spencer Kimball and Director of Community Jessica Edwards demonstrate how CockroachDB delivers horizontal scale across multiple regions. They'll scale from 3 to 8 to 32 nodes.

This demo is part 2 of a 4 part series:

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[RobertoHernandez-oktq]

when we add a node with same space size, the charges of data are distributed around the nodes ? i mean, if the original 3 nodes have 7.5 G each and they are full at 90%, when you add a new node, it will replicate and full the new node with the same 90% or will discharge some data from the 3 nodes in order to low down the fullness and split the overload data on the new node ?