I'm prepping for a vSphere upgrade to 5.5 and reading through the vCenter upgrade documentation, but I can't find anything about what happens to the current database during the upgrade. I have 4 hosts and around 40 VMs, so it's a small environment with the SQL Express. Does the database get upgraded using the vCenter simple install, or will I need to import it after the 5.5 installation? I've already upgraded the instances.
For that matter, what exactly does the db hold? The server is not in AD (plan to join it after the upgrade), and we don't have any custom users. What would I lose if the database is overwritten?
Thanks.