Upgrading / Migrating PI version and DB

Hello Everybody!

A customer wants to move from PI current DB (Oracle) to HANA or Sybase ASE and, also, current PI version (7.11) to 7.4. The idea is to keep dual-stack installation because the core, and most important, interface is made with ccBPM.

In the beginning the idea was only to upgrade PI version (I also posted the question here previously) but now they added the DB to the plan.

My question is: which is the best way to achieve this? Is it possible to install the new DB, copy PI, and after that, do the PI upgrade?

Or it would be more advisable to (afther the new DB installation) do a PI migration? If yes, which would be the best way to do the migration? Exporting/Importing SLD/IR/ID or any migration tool?

Thanks a lot!

Juan.