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If the term instance is used a single replica of that database is meant. Note that more than one instance with the same replica ID may exist on any given server.
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* The term 'application' is also used to indicate a category type of databases as defined in the topic Definitions.
** As panagenda ApplicationsInsights only has insights into the instances on servers it is analyzing it is important to ensure all servers are included in your discovery set. For details about this please refer to the technical documentation.