Hi Folks,
I'm using RMAN to do full-backup an 11GB database. RMAN is giving me exactly the same filesize. As you can imagine, this is unacceptable given the fact that the database is only about 35-40% used.
I've tried to do some clever stuff by creating a named pipe and compressing this pipe in the background using gzip. The problem is that RMAN will not output to my named pipe.
It gives error like "ORA-19504 Failed to create file" and ORA-27038 File exist". I know this file exist and I have also changed permission to 777 so that RMAN can at least modify it. But it doesn't!

Does anyone have any idea of how to compress RMAN backupsets as they are produced. Don't tell me to compress after RMAN completes because I don't have the space for the full backup set.
This pipe business works very well for Exp/Imp. Why not RMAN?

Thanks,
Jide.