HP-UX AAA Server A.08.00.01 Administrator's Guide

Figure 18-1 HP-UX AAA Server Deployment for Scalability and High-Availability
In Figure 18-1, the HP-UX AAA Server Manager manages multiple HP-UX AAA Servers
on three remote hosts (Host 1, Host 2, and Host 3). Each remote host is running more
than one HP-UX AAA Server. Running multiple HP-UX AAA Servers on the same
host ensures better utilization of system resources, thus ensuring greater scalability.
And running cloned HP-UX AAA Servers belonging to a single group on multiple
hosts provides high-availability of the AAA services.
For easier management of the HP-UX AAA Servers, each server is associated with a
group. In the given example, HP-UX AAA Server Manager manages three groups,
called Group A, Group B, and Group C, denoted by red, blue, and green respectively.
The servers in Group A and Group C are named S1, S2, and S3 and the servers in Group
B are named S1, S2, S3 and S4.
Group A is a group with a set of three HP-UX AAA Servers S1, S2 and S3, running on
the same host, Host 1. These servers running on Host 1, utilize the system resources
effectively, thus providing a scalable solution. By employing the load balancers, if one
of the HP-UX AAA Servers (for example, S2) on Host 1 is relatively free than the other
HP-UX AAA Servers on Host 1, new client requests can be directed to HP-UX AAA
270 Configuring HP-UX AAA Server for Scalability and High-Availability