When the Data Integration Service runs on a single node, disabling the service process disables the service.
When the Data Integration Service runs on a grid, disabling a service process does not disable the service. The service continues to run on other nodes that are designated to run the service, as long as the nodes are available.
Primary and back-up nodes
When you have the high availability option and you configure the Data Integration Service to run on primary and back-up nodes, disabling a service process does not disable the service. Disabling a service process that is running causes the service to fail over to another node.