One of the hallmarks of a cluster system is that users are unaware that they are logged in to a system made up of two Adaptive Servers; it appears as if they are logging in to a single system with access to all the databases on the cluster. Applications also see only a single system. They log in to either companion 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 the same. Both individual Adaptive Servers, as well as the cluster, may require system maintenance.
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