Orion Platform: The common back-end platform used by the SolarWinds Orion suite of products, including NPM, SAM, NCM, NTA, LA, and more. The platform provides the backbone for navigation, settings, and common features like alerts and reports.
Orion Web Console: The web interface you see when you log in that is used to view, configure, and manage all your monitored objects. It also provides a consistent look-and-feel across products, giving you a “single pane of glass” for your Orion monitoring tools.
Orion Application Server: A Windows server that runs the Orion Web Console and collects data from monitored objects. Also called the Orion Main Poller.
Orion Database Server: A Windows SQL server that should be hosted on a dedicated server in a production environment, separately from the Orion Application Server. It stores Orion configuration data and all collected performance and syslog data.
Polling Engine: A Polling Engine controls polling job scheduling, data processing, and queries your monitored devices for performance metrics like CPU, memory, and up/down status. Additional Polling Engines can be licensed to provide additional scalability and capacity. By default, the Orion Server provides one Polling Engine (often referred to as the Main Polling Engine).