The Informatica services consist of services to support the domain and application services to perform tasks and manage databases. The Informatica domain is the administrative unit for the Informatica environment. The domain is a collection of nodes that represent the machines on which the application services run. When you install the Informatica services on a machine, you install all files for all services. After you complete the installation, you can create application services based on the products and functionality that your organization purchased.
On Windows, you can use the Informatica services installer to install the Informatica services or the Data Transformation engine. On UNIX, you can use the Informatica services installer to install the Informatica services, Enterprise Information Catalog, or the Data Transformation engine.
When you install the Informatica services, you are prompted to create a domain or to join a domain. The first time you run the installer, you must create the domain. If you install on a single machine, you create the Informatica domain and a gateway node on the machine. If you install on multiple machines, you create an Informatica domain and a gateway node during the first installation. During the installation on the additional machines, you create gateway or worker nodes that you join to the domain.
The Informatica clients consist of thick client applications and web client applications. You use the clients to access the services in the domain. When you run the client installer, you can install the thick client applications.