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Pacemaker achieves maximum availability for your cluster services by detecting and recovering from node and service-level failures. It achieves this by utilizing the messaging and membership capabilities provided by your preferred cluster infrastructure (currently either Corosync or Heartbeat),
If the startup and shutdown of your service can scripted, Pacemaker can improve its availability. Pacemaker can manage clusters of practically any size and comes with a powerful dependency model for accurately modeling your environment.
Common node configurations that are possible to configure with Pacemaker.