Can a single ArcGIS Server have both Enterprise GDB and a Data Store

[RandyBonds_Jr_]

We are currently migrating from a standalone ArcGIS Server to the ArcGIS Enterprise environment. We have portal up and running and our ArcGIS Server federated. It has traditional ArcGIS Enterprise GeoDatabase on it.

We want to add a hosting server to portal. This is where the problem arises. As of 10.6.1, enterprise geodatabases are not supported as hosting servers, per this page:

Configure a hosting server—Portal for ArcGIS (10.6) | ArcGIS Enterprise 

"A hosting server's managed database must be configured with ArcGIS Data Store as a relational and tile cache data store. An enterprise geodatabase can still be registered as an additional data store to an ArcGIS GIS Server site."

It looks like there is a path for migrating on this page:

Change the managed database to an ArcGIS Data Store relational data store—Portal for ArcGIS (10.6) |... 

We have reviewed the page for the process to migrate, and would like to use option 2, but SLOWLY. We can migrate all our services to the new data store, but we really can't do that overnight. There are a lot of services and a lot of apps, and we don't have the staff to do that quickly. 

So my question, on the ArcGIS Server can I have my Enterprise GeoDatabase and the new Data Stores and have them happily live side by side? 

[JonathanQuinn · Accepted solution]

Yes, you can definitely have both an ArcGIS Data Store registered as the "managed" data store and your own enterprise geodatabase or database registered as a regular database data store. The ArcGIS Data Store doesn't replace your existing database, so there's no need to migrate your data into the ArcGIS Data Store. You should continue to use your own database for your authoritative data and introduce the ArcGIS Data Store for hosted services created through spatial analysis and services created through uploading zipped files to Portal or by publishing through clients like Pro. Below is a white paper on this topic which may clear things up:

https://community.esri.com/community/gis/enterprise-gis/arcgis-enterprise/blog/2018/06/13/esri-white...