The Distributed Configuration Database (DCD) is a replicated key/value store.
The App is not part of the standard support of Nubus or UCS.
The App saves configuration data of other Apps. The data is available, whereever DCD is installed; thus the App is able to store App configuration consistently across multiple App installations. DCD may be installed as an App dependency.
Test with UCS now Download UCS and activate Distributed Configuration Database directly from the App Center.
Further information 
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