Logical Server Configuration

In a multiplex, you can only access servers by using logical servers.

Not all member nodes may be available at all times to its logical server for reasons such as a failure or exclusion of a member node from the multiplex. At any given time, the effective logical server configuration represents the current dynamic constitution of the logical server consisting of all member nodes that are actually available for use to the logical server. The effective logical server configuration is essentially a function of static logical server configuration and dynamic state of the multiplex.

Note: Only multiplex configurations support logical servers. Information about built-in logical servers and logical server policies can remain in the catalog in a simplex environment, but is not used.

Connections in Simplex
In simplex, connections are unaffected by the login policy setting of logical server assignments.
Connections in Multiplex
In a multiplex, login policies control access to logical servers. All users of a login policy can only access those multiplex servers that are effective members of the assigned logical servers.

Parent topic: Sybase IQ Connections