Testing the configuration
Keep these points in mind to ensure reliable operations in the cluster:
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Start database instances at the same time on all desired nodes. This verification confirms multiple node access to the database.
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Start listeners on all nodes using the host names specified in the
listener.ora configuration files. This action may require configuring IP aliases on servers.
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Verify all instances are registered with all the listeners. This critical step ensures clients can connect to any listener to access any instance.
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Verify the client systems can access the new database.
