How is backup controlfile different? It doesn't contain the last SCN.
--
Mladen Gogala
Oracle DBA
> -----Original Message-----
> From: ml-errors_at_fatcity.com [mailto:ml-errors_at_fatcity.com] On
> Behalf Of Hemant K Chitale
> Sent: Wednesday, September 17, 2003 11:45 AM
> To: Multiple recipients of list ORACLE-L
> Subject: RE: Backup controlfile does not include ALTER TABLESPACE ...
>
>
>
> Dennis,
> Yes. Sometimes, Oracle doesn't want to do some additional
> work. Although I can't understand how the backup controlfile
> is different from
> the active controlfile
> in that manner.
>
> The last Support Analyst's response was
> "... the backup binary control file does not store
> information about the
> temporary files and this is a expected
> behavior."
>
> My retort before I closed the TAR [maybe I should be filing
> an Enhancement
> Request]
> was
> "I would expect the backup controlfile to have the same information
> as the original control file. If a trace from the active
> controlfile
> does provide the ALTER TABLESPACE .. ADD TEMPFILE .. I don't see
> why the backup controlfile cannot provide the same."
>
> Hemant
>
> At 12:04 PM 16-09-03 -0800, you wrote:
> >Hemant
> > I think that the Oracle philosophy is that there is no
> reason waste
> >time/tape to back up a temp tablespace. To help matters,
> Oracle added
> >the ALTER TABLESPACE command to the BACKUP CONTROLFILE TO TRACE. I
> >personally disagree, because after a database recovery this
> is one more
> >annoying thing to remember, and if you forget it, users
> often get more
> >upset over a strange tempfile error message than they do
> with a database crash.
> > But in Oracle's business you can't please everyone, and I don't
> >expect them to rearrange their internals to fix this obscure issue
> >soon.
> >
> >Dennis Williams
> >DBA, 80%OCP, 100% DBA
> >Lifetouch, Inc.
> >dwilliams_at_lifetouch.com
> >
> >
> >-----Original Message-----
> >Sent: Tuesday, September 16, 2003 10:25 AM
> >To: Multiple recipients of list ORACLE-L
> >
> >
> >
> >
> >RDBMS 8.1.7.4
> >Sun Solaris [although I would think that this does not matter]
> >
> >What is the common method of handling the missing TEMPFILE
> clause when
> >cloning a database using a Hot Backup and recreating
> controlfiles based
> >on the trace from the backup controlfile ?
> >
> >My description to the Oracle Support Analyst :
> > 1. TEMPFILE exists in the database.
> > 2. If I do an ALTER DATABASE BACKUP CONTROLFILE TO TRACE
> > I can see the ALTER TABLESPACE .. ADD TEMPFILE in the Trace file
> > 3. However, I do an ALTER DATABASE BACKUP CONTROLFILE TO
> >controlfilebackup.dbf
> > 4. I then copy controlfilebackup.dbf [with the Hot Backup of all
> >Database Files] to the cloning server
> > In the Cloning Server/Database :
> > 1. I copy in controlfilebackup.dbf to the expected
> control01.ctl location
> > 2. I issue an STARTUP MOUNT to read the controlfile
> > 3. I then issue ALTER DATABASE BACKUP CONTROLFILE TO TRACE
> > Here, the ALTER TABLESPACE .. ADD TEMPFILE is missing ! It just
> > does not appear.
> > Therefore, if I recreate the controlfile and/or OPEN
> RESETLOGS the
> > database, the TEMPFILE is missing as it does not exist on the
> >cloned-server.
> > However, I do not have the ALTER TABLESPACE .. ADD
> TEMPFILE command
> > to add it back.
> > I have to go back to the source database, get a TRACE
> backup of the
> >controlfile
> > to regenerate the ALTER TABLESPACE .. ADD TEMPFILE statement.
> >
> >
> >The Analyst's response :
> >When you create a backup of the controlfile the backup will not have
> >information about tempfiles.
> > To incude temporary tablespace in backup strategy follow
> the note:-
> >167135.1( How to Incorporate Locally Managed
> > Temporary Tablespaces into the Backup Strategy)
> >
> >Is there a TechNote or Documentation reference which specifies
> > why/how tempfiles are excluded from backup controlfiles ?
> >
> > My current backup strategy uses DBA_DATA_FILES to identify files
> > to copy out / backup to tape / other storage. It ignores
> > DBA_TEMP_FILES.
> > However, even if I were to include DBA_TEMP_FILES or V$TEMPFILE
> > and copy the file out, my backup controlfile would not be aware
> > of it. Recovery would be ok if I do not have to recreate the
> > controlfile. I normally recreate the controlfile to easily
> > relocate the datafiles before beginning recovery.
> > Hmm..... I guess my backup script should also list the TEMPFILES
> > in a .list file in my backup destination and I use the .list
> > file to identify tempfiles. Not neat.
> >
> >
> >
> >Hemant K Chitale
> >Oracle 9i Database Administrator Certified Professional
> >My personal web site is : http://hkchital.tripod.com
> >
> >
> >--
> >Please see the official ORACLE-L FAQ: http://www.orafaq.net
> >--
> >Author: Hemant K Chitale
> > INET: hkchital_at_singnet.com.sg
> >
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> >Author: DENNIS WILLIAMS
> > INET: DWILLIAMS_at_LIFETOUCH.COM
> >
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> Hemant K Chitale
> Oracle 9i Database Administrator Certified Professional
> My personal web site is : http://hkchital.tripod.com
>
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: Hemant K Chitale
> INET: hkchital_at_singnet.com.sg
>
> Fat City Network Services -- 858-538-5051 http://www.fatcity.com
> San Diego, California -- Mailing list and web hosting services
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--
Author: Mladen Gogala
INET: mladen_at_wangtrading.com
Fat City Network Services -- 858-538-5051 http://www.fatcity.com
San Diego, California -- Mailing list and web hosting services
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Received on Wed Sep 17 2003 - 10:54:50 CDT
