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By default, Failover Manager expects the cluster members file to be named efm.nodes. If you name the cluster members file something other than efm.nodes, you must modify the Failover Manager service script to instruct Failover Manager to use the new name.
The Membership Coordinator will update the contents of the efm.nodes file to match the current members of the cluster. As agents join or leave the cluster, the efm.nodes files on other agents are updated to reflect the current cluster membership. If you invoke the efm stop-cluster command, Failover Manager does not modify the file.
If the Membership Coordinator leaves the cluster, another node will assume the role. You can use the efm cluster-status command to find the address of the Membership Coordinator. If a node joins or leaves a cluster while an agent is down, you must manually ensure that the file includes at least the current Membership Coordinator.
If the stable.nodes.file property is set to true, the Membership Coordinator will not update the .nodes file when cluster members join or leave the cluster; this behavior is most useful when the IP addresses of cluster members do not change often. For information about modifying cluster properties, see Section 3.4.1.1.


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