Providing Open Architecture High Availability Solutions

Providing Open Architecture High Availability Solutions
33
4.3.1 System Components
An HA cluster is composed of several systems, and each system has many individual components.
Each of these components has a specific role in the application – and each may also have different
roles, effects, and participation in the overall system availability, and in an open HA framework.
In addition to a cluster environment, HA arrangements can be implemented within a systems by
providing redundant internal components and data paths. For example a typical redundant
CompactPCI system might consist of dual system boards, dual PCI busses, and a redundant set of
I/O cards or peripheral slot processing cards as shown in Figure 10.
Figure 9. Clustered System Arrangement
System
SystemSystem
System
System
System
Active and Redundant
Switching Fabric