Using resource groups : Using a resource group : About Factory and View service requirements
 
About Factory and View service requirements
After you create a custom resource group for a cluster, you need to understand the Factory and View service requirements for nodes assigned to the resource group. It is also important to consider the effect that using resource groups has on performance.
You must enable only the View service on iHub to fulfill requests to view persistent documents. Persistent documents are documents that are saved on a volume. You must enable both the View and Factory services on iHub to fulfill all other requests to generate and view documents.