RE: Common Oracle RDBMS Misconceptions

Same as in normal operation. That's where the before image of any data changed is stored for undo. My point was that Oracle operates as you would normally expect it to, except the header block of the files are frozen at the start backup checkpoint, and you generate more redo as it is logging the stuff that needs to be applied when restored (until the end backup command).

>>>>>>>>>>>>>>>>>> Original Message <<<<<<<<<<<<<<<<<<

On 6/26/01, 11:10:28 AM, Jeremiah Wilton <jwilton_at_speakeasy.net> wrote regarding RE: Common Oracle RDBMS Misconceptions:

> Rollbacks? What's their role in the hot backup mechanism?

> --
> Jeremiah Wilton
> http://www.speakeasy.net/~jwilton

> On Tue, 26 Jun 2001, Holman, Rodney wrote:

> > Yep, that's the way it works. Whoever started the rumor that the
datafiles
> > were unwriteable hadn't looked into the process deeply enough to
understand
> > it. The Oracle Ed. class that I took for backup and recovery explained
the
> > process exactly as it is, using the checkpoint, redo, and rollbacks but
> > still writing to files.
> >
> > > -----Original Message-----
> > > From: novicedba [SMTP:novicedba_at_hotmail.com]
> > >
> > > I visited Jeremiah Wilton's web page <http://www.speakeasy.net/~jwilton>
> > > I was shocked to read Hot backup mode explained
> > > <http://www.speakeasy.org/~jwilton/hot-backup.html>
> > > If this is true then I may be a victim of a disease called
> > > 'Common Oracle RDBMS Misconceptions' . Somebody help me!! (Jim
carrey-MASK
> > > style)

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> Author: Jeremiah Wilton
> INET: jwilton_at_speakeasy.net

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--
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--
Author: Rodd Holman
  INET: rodney.holman_at_lodgenet.com

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