Cluster services
Cluster services are an integral part of the cluster. They are responsible for the following activities:
•  Entry point to the cluster: Users connect first to the server that is running this service through the HTML page (AX3270.HTM, AX5250.HTM or AXVT100.HTM).
•  Authenticating users upon sign-on: The cluster service receives the user credentials and performs the authentication task according to the client authentication type.
•  Load balancing connections among the Servers based on the actual current load.
•  Maintenance of real time data in the database: If the cluster service detects that one of the Servers is not working, it manages cluster fail over by automatically removing failed services from the cluster and returning them when re-detected.
You must have at least one cluster service running in your cluster regardless of the number of servers.