.. index:: Definitions
| Term | Definition |
|---|---|
| Admin Node | System running the containers needed for Digital Rebar. Can be VM or Phyiscal |
| Anneal | The method of processing unrun Node Roles on Nodes. |
| Bare Metal Node | Any physical node managed by Digital Rebar. |
| Managed Node | Any node that is managed by Digital Rebar. Can be VM or Physical |
| Node | A VM or physical system that Digital Rebar may manage or is managing. It is represented by a :ref:`object_node`. |
| Node Role | An instance of a role on a specific node. These are sequenced into a directed graph and annealed to completion. |
| Role | An atomic piece of functionality to apply to a node. :ref:`object_role` |
| Sledgehammer | A RAM-only boot environment served by the provisioner for bare metal node discovery |