Query related to PersistentDict

[animesh-workplace]

This module contains functionality that allows hashing with keys that remain valid across interpreter invocations, unlike Python’s built-in hashes.

Regarding the above line in the description of PersistentDict available at link. What happens when multiple instances of the same program using PersistenDict are running?
Do all the instances use:

• the same dict to update the values
• different dict to update the values