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This page shows a list of configured instances of PMA.core. An instance of PMA.core is an installation of PMA.core that share the same database as part of a group of Instances. This section is particular relevant in the context of geo-replication scenarios.
Usually each instance is a replica of PMA.core at a different server and location. You can set an instance as the current running in this page by clicking on the Edit → Set current button
Clicking on the Add new instance button will take you to the page to add a new Instance of PMA.core. The only needed information about an instance is a unique Name and a Description. After creating a new Instance you can set it as current via the index page by clicking on the Edit → Set current button