Having too many Subordinate References at this level can make your tree much more difficult to scale and maintain. This container object is called the partition root object. Each partition can have only one partition root object. Partitions cannot overlap. No one object will ever reside in two partitions.
Partitions contain all of the information for the connected subtree.
In other words, you can think of each partition as a section or subtree of the entire NDS tree. Parent and child partitions help you logically organize the NDS tree so you can efficiently distribute network data across multiple servers. They also help maintain the tree's hierarchical organization.