Back and restore from 8.0.1 to 9.0.1
A customer of mine is currently running on Vertica 8.0.1. Now they need to migrate to a new hardware, and use the opportunity to move to Vertica 9.0.1. Can the entire database on 8.0.1 be backed up, and restored on 9.0.1? Documentation suggests both need to be on exact same version. Is that a case of just official supportability, or are there any known issues?