Re: Online tablespace hot backup

Karl R. wrote:
>
> Putting a Tablespace in HotBackup Mode prepares the tablespace
> for beeing backuped by an external Backuptool. Without
> switsching to hot backup mode the backup of the datafile would
> be inconsistent because of its impossible to reconstruct changed
> Oracle-Blocks. This is due the external backup-toll backsup OS-
> Blocks but NOT Oracle-Blocks. For this reason in Hot Backup-Mode
> the whole Oracle-Block is backuped when a transation modoifed it.
>
> With Oracle8 you can use revovermanager. You need not to switsch
> the tablespace in Backup-mode because rman read the complete
> Oracle-Block frm the SGA.
>
> BYe
>
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Its worthy of note that only the first time a block is modified is the whole block written...

HTH

-- 
===========================================
Connor McDonald
http://www.oracledba.co.uk

We are born naked, wet and hungry...then things get worse