6. The method of claim 1 , wherein the new primitive includes a particular first identifier of a particular primitive in the first plurality of primitives that the new primitive is modifying, and wherein updating the concentric database with the new primitive comprises: identifying a particular second identifier for the particular primitive; and replacing, in the new primitive in the concentric graph database, the particular first identifier with the particular second identifier.
1. A method performed by a system of one or more computers, the method comprising: receiving a transaction representing an update to a master graph database, the transaction including a new primitive and a first unique identifier for the new primitive in the master graph database; updating a concentric graph database with the new primitive, wherein the concentric graph database includes a first plurality of primitives and a second plurality of primitives, wherein each of the first plurality of primitives is also included in the master graph database and none of the second plurality of primitives are included in the master graph database, and wherein updating the concentric graph database with the new primitive comprises assigning a different, second unique identifier to the new primitive in the concentric graph database; and storing a mapping from the second unique identifier to the first unique identifier in the concentric graph database.