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RE: HIstorical Table Backup

From: Ron Rogers <RROGERS_at_galottery.org>
Date: Wed, 21 Feb 2001 22:07:14 -0800
Message-ID: <F001.002B9D40.20010221093602@fatcity.com>

Alex,
If the backup was taken with the t-s in read only mode and the failure occured after the change to r-w and you do not have the archivelogs then I believe you have to use the backup control file to recover your t-s back to time T1. It sounds like you are not the only person with DBA privs. It is a good practice to perform a backup of the t-s and control file wher the status changes. If you can't get it working contact OWS.
ROR mm

>>> Alex.Berindei_at_elsag.it 02/21/01 10:21AM >>>

Thanks Ron and Stephane,
but I still have one situation:
What if:
- at time T1, I backup the "read only" tablespace => TS(T1) - time T2, someone puts the tablespace "read write" and makes a change TS(T2)
I wasn't able to recover the file even to the time T1 if I don't have all the archive logs since T1 - the SCN are not okay. Do you know if is there any way to put back in use TS(T1) if I lost TS(T2)?

Thx alex.

> -----Original Message-----
> From: Ron Rogers [mailto:RROGERS_at_galottery.org]
> Sent: Tuesday, February 20, 2001 8:31 PM
> To: Multiple recipients of list ORACLE-L
> Subject: Re: HIstorical Table Backup
>
>
> Alex,
> If you make some of your tablespaces "read only" then you
> will be able to back them up to tape one time after you have
> made them "read only". The system will know that the SCN has
> not changed and you can restore them any time you need to.
> You can backup each tablespace any time you want to because
> the data will not be changing until the next time you alter
> the tablespace xxx read write. Make sure you "backup
> controlfile to trace" each time you make a change to the database.
> ROR mm
>
> >>> Alex.Berindei_at_elsag.it 02/20/01 01:16PM >>>
>
> Hello you all,
> I have a large historical database and I partitioned by date
> range tables.
> I don't which is a good way to backup old partitions, which I
> make ReadOnly,
> in a way to be able to restore the contents from the time I
> put them in
> ReadOnly mode.
>
> Since the database will be large (800Gb) I would like not to
> backup all
> database all the time, but only the current date partitions
> (this means also
> tablespaces, because I want to create every partition in a separate
> tablespace).
>
> Do you know if this is possible?
>
> Thx, alex.
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
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> Author: Berindei Alex
> INET: Alex.Berindei_at_elsag.it
>
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--
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--
Author: Berindei Alex
  INET: Alex.Berindei_at_elsag.it 

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--
Author: Ron Rogers
  INET: RROGERS_at_galottery.org

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
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Received on Thu Feb 22 2001 - 00:07:14 CST

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