Illustration of a web farm configuration

The following tasks are performed in a web farm configuration:

The client applications send requests through a firewall to a load balancer. The load balancer distributes requests among application servers.
The job scheduler services on all of the application servers run; however, only the primary job scheduler processes requests. The other job scheduler services do not accept any requests. Examples of tasks that require the job scheduler service include importing and validation.
All tasks that do not require the job scheduler service are distributed among the application servers.