A new system contains a single host and vault, called the bootstrap host and bootstrap vault, but in order to expand the resources available to your system users will want to add host objects and vault objects to your system.
A host is a physical machine (workstation, PC, etc.) that contains at least one processor and can contain active Legion objects.
A vault stores inactive Legion objects: it is a persistent storage space that manages the persistent storage space of inert (i.e., inactive) Legion objects and is the virtual representation of a persistent storage space on a processor. A vault can be in a file system, database system, tape drive, CD-rom, etc.
|Figure 13: Simple Legion system|