Best practice for backup/restoring a single database throughout the PXC

Hi guys.
I am experimenting with PXC and my plan is to set up a 5 node cluster which should contain 2 databases for two separate applications. I am trying to figure out how I should backup each of the databases and how to restore only database1 to all nodes in the cluster without downtime for database2. I cannot find this in the documentation. Can you please advise.
Thank you.