Dispatcher

The dispatcher starts all IBM Cognos services configured. It also routes the requests given by the gateways. It can route requests to a local services, such as report service, query service, repository

service or system service. This way dispatcher perform load balancing.

It is a multi-thread application, it can use one or more threads per requests. Any configuration change in the application are routinely communicated to all running dispatchers. It also includes  IBM Cognos Application Firewall to provide security for IBM Cognos BI.

When a dispatcher starts, it registers itself with content manager and this way each dispatcher have information about other dispatcher. If one dispatcher fails or unavailable, request for that dispatcher are routed to next available dispatcher until the failed dispatcher re-register itself