The node type determines whether the node can serve as a gateway or worker node and determines the domain functions that the node performs. The first time that you install the Informatica services, you create a gateway node and the Informatica domain. When you install the Informatica services on other machines, you create additional gateway nodes or worker nodes that you join to the domain.
One gateway node serves as the master gateway node for the domain. The master gateway node receives service requests from clients and routes them to the appropriate service and node. The Service Manager on the master gateway node performs all domain operations on the master gateway node. The Service Managers running on other gateway nodes perform limited domain operations on those nodes.
A worker node is any node not configured to serve as a gateway. A worker node can run application services, but it cannot serve as a gateway. The Service Manager performs limited domain operations on a worker node.