Glossary
ESB3024 CDN Director definitions of commonly used terms
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- AgileTV Content Delivery. The overall CDN solution comprising the Manager (ESB3027) and CDN Director (ESB3024) components.
- CDN Director
- A short form for “ESB3024 CDN Director” used in this document.
- Classifier
- A filter that associate a request with a tag that can be used to define session groups.
- Confd
- A backend service that hosts the service configuration. Comes with an API, a CLI and a GUI.
- ESB
- A software bundle that can be separately installed and upgraded, and is released as one entity with one change log. Each ESB is identified with a number. Over time, features and functions within an ESB can change.
- Lua
- A widely available scripting language that is often used to extend the capabilities of a piece of software.
- Request Router
- A request router redirects HTTP/HTTPS requests to a backend that can serve them. This document mentions two request routers: ESB3024 CDN Director and ESB3008 Convoy Request Router. When used without other context, the term “Request Router” is used for the ESB3008 Convoy Request Router.
- Router
- An old term for the CDN Director. It is used in some configuration options and in metrics.
- Selection Input API
- Data posted to this API can be accessed by the routing rules and hence influence the routing decisions.
- Session Group
- A handle on a group of requests, defined via classifiers.
- Subnet API
- An API to define mappings between subnets and names (typically regions) for those subnets. Routing rules can then refer to the names rather than the subnets.