In the future, we have planned to move to a multi instance model for wiki replicas. This requires some changes on the client side to work, especially in Quarry, which currently connects to one database hostname and then lets you switch databases from there.
The requirements here are:
- Set up a widget that lets you enter or select the database you wish to query.
- Any backend changes that allow you to connect to the right domain name for the database you have selected (eg. frwiki.db.svc.analytics.eqiad.wmflabs)