By specifying group-name and group-password, you can separate your clusters in a simple way; dev group, production group, test group, app-a group etc...
To enable groups, change the cluster.xml configuration of particular instances:
<hazelcast>
<group>
<name>production</name>
</group>
</hazelcast>
For more, please refer to official Hazelcast documentation https://docs.hazelcast.org/docs/latest/manual/html-single/index.html#creating-cluster-groups.
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