I believe you must be running on archivelogs as well. I suggest you maintain a FRA for backups and archivelogs. Ideally the FRA should be 3 times the size of the database.
Please refer the following docs:
Also check forum:
You can setup FRA as mentioned by Asif Muhammad
Additionally, you can use RMAN backup compression feature, if you have space constarints to store the backup.
i have 11g oracle database and my database size is 120gb .how much hard disk space i must keep to take backup of my database using rman .my backup strategy is on sunday i take level 0 incremental backup and on mon,tue.wed,thurs,fri and sat i m taking incremental level 1 differential backup.so how much minimum space i must keep on my hard disk for 1 week rman backup? your help appreciated.
thanks and regards,
This is a question I'm having to answer as well. There are a lot of variables that determine how much space will be needed in any particular circumstance and the guidelines are only just that, guidelines. I read the links presented by Abufazal and while they are as good a starting point as any, you really have to read them with a critical eye and a firm understanding of your own backup and recovery requirements. Ultimately the only way to know how much space is going to be needed is to run the backups and see.
I have one of my database of same size. I take full database backup every day. The backup is in compressed form using following cmd
backup as compressed backupset format '/LOCATION/<SID>_rman_%s_%T_%t.bkp' database;
The total size of rman backup is 33 gb. So you have got a reference for it.
Next for your level 1 backup it might be arround 60gb for the whole week.
So in all you might require a minimun of 100gb for a week.
This is just for your reference so you can get a idea for it. The size can change depending on your database.