Similar to Updating, but more complicated, because we need to bring down all the services to do the upgrade, because the DB may not be compatible between the 2 releases.

It would be desirable to be able to do the upgrade with:

• Minimum service downtime
• Not breaking any ongoing operation
• Minimum human operator interaction

Ideally

• Would take into account that the driver namespace in the configuration has changed
• Would take into account that configuration options may have dissapeared
• Would support rollback on the upgrade
• Would support a parallel test to confirm that the driver at least loads with the old configuration