But it will be on the same physical machine or on a separate server? How big will be the DB?
Will be in the same topology? Separate topologies?
If you can afford some downtime and you've got different machines, you could plan a 'cold' migration:
- Stop the old DS instance
- Export to LDIF with NO REPLICA INFORMATION (this will also clean up a bit the DB!)
- Copy schema and indexes definition from source to target environment.
- Import from LDIF to the new DS topology
After that you'll have to tune the new environment, in terms of memory , entry cache, indexes, etc...