One of the hallmarks of a cluster system is that users are unaware that they are logged into a system made up of of two Adaptive Servers. To the users, it appears as if they are logging into a single system with access to all the databases on the cluster. Applications, also, only see a single system. They log into either of the companions and have access to all the databases on the cluster.
However, the System Administrator must treat the system as being made up of two distinct Adaptive Servers. Both Adaptive Servers must be installed and configured individually, and their configuration may not be exactly the same. Both individual Adaptive Servers, as well as the cluster may require system maintenance.
