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Active - Standby Grouping

In an active/standby group, the primary server is processing, and the back-up servers are standing by in case of a failure on the primary server. The standby systems can be smaller, lower-performance systems, but they must have the processing capability to assure resource availability should the primary server fail.

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A standby server can provide backup for more than one active server. For example in the figure above, Server 2 is the standby server in three active/standby resource pairs. The LifeKeeper resource definitions specify the following active/standby paired relationships:

Be aware of these three critical configuration concepts when you are considering configurations with multiple active/standby groups:

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