Originally posted by ocp8
I am looking at implementing RMAN at my shop and have had numerous questions about the MTTR of our systems. I am facing a lot of resistance by people who are saying using RMAN will cause our downtown to be a lot longer than normal.
Restoration with RMAN is no doubt much faster and automated than manual restoration provided that you have planned your backup strategy properly.

On our HR system, for example, we would lay the hot backup files down and roll it forward. If I was to use RMAN with a weekly level 0 and incrementals during the week how much longer would it take to restore?? I do not have any practical experience with RMAN and I need to know this info if I plan on using it.
No need to bother about hotbackup, RMAN doesnot.

RMAN uses Oracle server processes to perform the reading of the database blocks from the datafiles, hence they are able to use the same read-consistency mechanism that SQL statements use.

RMAN records the SCN at the point-in-time the backup of the datafile started, in its own Recovery catalog in the control files, so there is no need to freeze the datafile headers. Without freezing the datafile headers and without the need for putting the tablespaces into backup mode, there is no longer any need for the ALTER TABLESPACE… BEGIN/END commands.


For more information

http://otn.oracle.com/docs/products/...a96566/toc.htm

HTH