How to move data from one Central install to another

How people (including for ourselves) can move data from one install to another install (including a change of hostnames).

Only thing that isn't portable that I'm aware of is the absolute links in the Enketo redis store.

Start by investigating how data is stored and transferred between Central installations, including cases where hostnames change. Check the Enketo Redis store specifically for non-portable absolute links. Done means the documentation explains a complete migration procedure and clearly identifies any remaining portability limitations.

Written by the indexing model from the issue text.