that one's been around for years! Jeremiah has corrected, and corrected
and corrected it, but it persists
just like those baby alligators in the NYC sewer system rumors...
- Paul Baumgartel <treegarden_at_yahoo.com> wrote:
> Holy cow. That is outrageous! Gets my vote.
>
>
> --- Jeremiah Wilton <jwilton_at_speakeasy.net> wrote:
> > Gotta be this one. I wouldn't love it so much except for the part
> > about the USS Nimitz.
> >
> > > When you place a tablespace in backup mode, the Oracle instance
> > > notes that a backup is being performed and internally compensates
> > > for it. As you know, it is impossible to make an authentic copy
> of
> > a
> > > database file that is being written to. On receipt of the command
> > to
> > > begin the backup, however, Oracle ceases to make direct changes
> to
> > > the database file. It uses a complex combination of rollback
> > > segments, buffers, redo logs, and archive logs to store the data
> > > until the end backup command is received and the database files
> are
> > > brought back in sync.
> > >
> > > Simplifying a hot backup in this way is tantamount to classifying
> > > the USS Nimitz as a boat. The complexity of the actions taken by
> > the
> > > Oracle RDBMS under a hot backup could consume an entire chapter
> and
> > > is beyond the scope of this book. What you should understand is
> the
> > > trade-off for taking a hot backup is increased use of rollback
> > > segments, redo logs, archive logs, and internal buffer areas
> within
> > > the SGA.
> >
> > --
> > Jeremiah Wilton
> > http://www.speakeasy.net/~jwilton
> >
> > On Thu, 14 Mar 2002, Freeman, Robert wrote:
> >
> > > Ok... one of my favorite Urban Legends is this one:
> > >
> > > The book is always right. In other words, if it's written down
> > > in a book we bought off of Amazon, it must be so.
> > >
> > > So, I'd like to ask, without anyone taking potshots at
> > > specific authors, what is the dumbest, silliest, or most
> > > technically incorrect thing you have ever seen in an
> > > Oracle book?
> >
> > --
> > Please see the official ORACLE-L FAQ: http://www.orafaq.com
> > --
> > Author: Jeremiah Wilton
> > INET: jwilton_at_speakeasy.net
> >
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>
> __________________________________________________
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> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Paul Baumgartel
> INET: treegarden_at_yahoo.com
>
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Do You Yahoo!?
Yahoo! Sports - live college hoops coverage
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--
Author: Rachel Carmichael
INET: wisernet100_at_yahoo.com
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Received on Thu Mar 14 2002 - 16:14:21 CST
