When you create a shared-disk cluster, Adaptive Server automatically creates a system logical cluster for it. The system logical cluster provides a logical cluster representation for daemons and enables management of certain tasks. It represents the physical cluster, contains all the instances of the physical cluster, and has the same name as the physical cluster. All background tasks, such as checkpoint and housekeeper, run on the system logical cluster. Special rules apply to the system logical cluster. Upon creation, this new system logical cluster is granted the open property, which means that all unbound connections are routed to it.
System administrators typically do not interact with the system logical cluster. However, the following do apply to the system logical cluster:
Routing rules. For example, you can route logins used by system administrators to the system logical cluster.
The open property.
System view setting.
The load profile.
Login distribution mode.
The following do not apply to the system logical cluster:
Failover resources and rules
Commands that:
Create or drop resources of a logical cluster
Migrate, fail over, and fail back instances
Change a logical cluster or instance state
Change failover mode settings
Change start-up mode settings
Set the down routing mode
