If I have two machines A and B, how can they both access and modify data in the same orbit-db at the same time

[justaluckyguy]

If I have two machines A and B, how can they both access and modify data in the same orbit-db at the same time, I create the database on A, use the address db.address.toString() returned by A on machine B, and find that the database is always empty

[haadcode]

See the access controller documentation for an example how to allow multiple writers into a database.

For database appearing empty, make sure that it gets replicated and that the peers are connected.