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Additional info for IBM Certification Study Guide Aix Hacmp
This is a trade-off that you will have to make between availability, performance, and cost. Rotating Standby Configuration This configuration is the same as the previous configuration except that the resource groups used are rotating resource groups. In the hot-standby configuration, when node 1 reintegrates into the cluster, it takes back the resource group since it has the highest priority for it. This implies a break in service to the end users during reintegration. If the cluster is using rotating resource groups, reintegrating nodes do not reacquire any of the resource groups.
For example, a site may want to use a network_down notification 44 IBM Certification Study Guide AIX HACMP event to inform system administrators that traffic may have to be rerouted. Afterwards, you can use a network_up notification event to inform system administrators that traffic can again be serviced through the restored network. 3 Predictive Event Error Correction You can specify a command that attempts to recover from an event script failure. If the recovery command succeeds and the retry count for the event script is greater than zero, the event script is rerun.
This can be as easy as looking for a specific process, or much more complex, depending on the application. 1, “Single Point-of-Failure Hardware Component Recovery” on page 46.