Advanced Password Services will operate simultaneously on any number of Web Servers using a single set of SiteMinder Policy Servers. In case of a failure of the SiteMinder server, APS can switch over to secondary servers in the same way that a Web Agent will. Primary and backup Policy Servers are configured using the SmPortal.cfg file (see the SmPortal/SmTransact Administration Guide). They can be configured either in failover or in round-robin mode.
Each SiteMinder Policy Server must have Advanced Password Services installed. Each such server is configured separately and independently. It is important that the configuration of all such machines be identical, though APS does not enforce this. There are some cases where they should differ between machines, but this always involves specific performance tuning when the Policy Servers are geographically dispersed.
See the description of the Max Failures setting for details about how multiple Policy Serves impact that functionality.
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