Informatica Powercenter Domain

Domain

Domain is an administrative unit in PowerCenter. Domain is collection of nodes and services. Domain can run single version of application services or multiple versions of application services. Mixed version domain is very rare in real world.

Node is a logical representation of a machine in Domain. One node in Domain acts as a gateway and direct user requests to nodes and services based on the Domain and node configuration.

The Administrator tool consolidates the administrative tasks for domain objects. You manage the domain and the security of the domain through the Administrator tool.

Services for the domain include the Service Manager and a set of application services:

• Service Manager. A service that manages all domain operations. It runs the application services and performs domain functions on each node in the domain. Some domain functions include authentication, authorization, and logging.
  
• Application Services. Services that represent server-based functionality, such as the Model Repository Service and the Data Integration Service. The application services that run on a node depend on the way you configure the services. 

Difference between Authentication and authorization...

Authentication verifies Who you are. For example login to your unix server using ssh client or access your e-mail account...

Authorization verifies what you are authorized to do. For example, you are allowed to login into your Unix server via ssh client, but you are not authorized to browser /data2 or any other file system.