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RE: RMAN ReadOnly Tablespace Question

From: Kimberly Smith <ksmith2_at_myfirstlink.net>
Date: Fri, 04 Jan 2002 19:52:08 -0800
Message-ID: <F001.003E7AE3.20020104193518@fatcity.com>

How can RMAN backup a read only tablespace? I mean if you forget to tell it to ignore read only tablespaces. I know it could do it in cold but in hot you cannot put a read only tablespace into backup mode. Maybe it does not use the same method as a hot backup???? Just curiosity getting the best of me. Its amazing what will bug me as I wait for supper.

-----Original Message-----
Sent: Friday, January 04, 2002 7:02 PM
To: Multiple recipients of list ORACLE-L

Unless you explicitly tell RMAN to skip read-only tablespaces, it will back them up the first time around, once that is done, it will not back them up again unless you alter the tablespace from read-only to writeable.... then RMAN is intelligent to know that its original backup copy may no longer be valid, so it grabs another.

There is an inherent caveat to this.... if you back up to tape, retain tapes on-site for two months, then have the tablespace become corrupt after 3 months... you will not be able to restore without bring the tape back on-site... so you may want to "trick" rman periodically (hopefully at least as often as your tapes are taken off-site) by issuing a command to put it in "read/write" mode then switch it right back to "read-only" to force a new copy on you backup set.

HTH,
-Ron-

> -----Original Message-----
> From: root_at_fatcity.com [mailto:root_at_fatcity.com]On Behalf Of Pat Howe
> Sent: Friday, January 04, 2002 3:21 PM
> To: Multiple recipients of list ORACLE-L
> Subject: RMAN ReadOnly Tablespace Question
>
>
> With "RMAN Incremental backups" will a Level 0 backup always backup "ALL"
> tablespaces including previously backed up READONLY tablespaces ?
> Or is RMAN smart enough to realize that it has a current backup of all the
> READONLY tablespace and only backup the READ/WRITE tablespaces ?
>
> Thanks in Advance
>
> _________________________
> Patrick J. Howe
> Oracle DBA
> Illuminet Inc. (Carrier Division of Verisign)
> 4501 Intelco Loop SE
> Olympia, WA 98507
> Phone : 360.493.6284
> Email : phowe_at_illuminet.com
>
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Pat Howe
> INET: phowe_at_Illuminet.com
>
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--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: Ron  Yount
  INET: ronwy_at_swbell.net

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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Kimberly Smith
  INET: ksmith2_at_myfirstlink.net

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 Fri Jan 04 2002 - 21:52:08 CST

Original text of this message

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