1. A method for managing metadata associated with entities and entity types in a computing system, the method comprising: initializing a global static metadata cache containing global static metadata at the computing system; initializing a global dynamic metadata cache containing global dynamic metadata at the computing system; receiving a command to initialize a session at the computing system; determining a realm for the session, wherein the realm is a virtual private partition of the computing system; initializing a realm-scoped dynamic metadata cache containing realm-scoped dynamic metadata associated with the realm at the computing system; and executing operations on the computing system in compliance with the global static metadata, the global dynamic metadata, and the realm-scoped dynamic metadata.