How Redundancy Handles SPOFs

In terms of the SPOFs that are described at the beginning of this chapter, redundancy handles failure in the following ways:

• Single hardware failure. A single hardware failure is fatal to a machine. Therefore, even if you have redundant hardware, manual intervention is required to repair the failure.

• Directory Server or Directory Proxy Server failure. The server is automatically restarted.

• Database corruption. Depending on the architecture, a redundant solution should be able to survive database corruption.