Terminology

Catalyst reuses a few words with precise meanings. When docs say one of these, they always mean the following:

Term	Meaning
Panel	The Catalyst web application and API you log in to.
Node	A machine running the Catalyst agent that hosts game servers.
Agent	The service on a node that runs containers and talks to the panel.
Server	One game instance with its own files, limits, ports, and backups.
Template	A reusable recipe for a game (image, startup command, install script).
Nest	A category that groups related templates (for example, Minecraft).
Allocation	An IP + port pair on a node assigned to a server.
Subuser	An extra account given limited access to someone else’s server.
Task	A scheduled action on a server, such as a restart or backup (see Tasks).
Backup	A restorable snapshot of a server’s files.
Database	A managed database attached to a server (for plugins and mods).
Role	A named set of permissions administrators assign to users.
API key	A token that lets scripts and integrations call the Catalyst API.

One common confusion: a node is a machine, while a server is a game running on that machine. If your game lags, the problem may be the server’s limits or the node’s load — troubleshooting helps you tell the difference.