im trying to understand child/parent/grandparent, the doc says if you add a child of a parent, it is likely not to be created on the same shard as the grandparent. why?
"document was routed to a shard by its own parent ID—uk. It is very likely that the grandchild would end up on a different shard from its parent and grandparent"
If the child and parent are on the same shard, wouldn't the child of that child get put on the same shard?