alternative to incremental export backup
We are using expdp utility to take schema export backup. We have scheduled in cron job which gets executed every alternate hour during working hours like 11am, 1pm, 3 pm, 5 pm and 7pm. Due to data growth in schema export backups takes 30 to 45 mins to completed and during export backup memory utilization reaches to 100%. Since we need only export backup to restore to the same database or other database RMAN incremental backup is ruled out because generally developer himself import the data and client has also dont want to go for RMAN backup/restore.
I would like to know if any other method by which we can take the incremental export backup as the incremental exp backup has been obsolete. Hence looking for solution where we can take backup od only changed data.