journalPrefix does not run with backup_functions.sh if it is set to something else other than /p4/<instance>/~.
It would be good if SDP works with a value set to journalPrefix.
There is a case that users keep their backups in a central location that follows an archival strategy that meets their compliance requirements. They can store each instance backup in a named directory, but restoring from a backup in the event of failure with multiple instances becomes confusing when they have multiple instances with the same SDP name - host1 instance1 and host2 instance1 both produce backups named p4_1*.