RE: Accidentally created local df in RAC
- From: Herring Dave - dherri <Dave.Herring@xxxxxxxxxx>
- To: Lei Zeng <lei.zeng@xxxxxxxxx>, "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 8 Mar 2012 13:26:21 +0000
Lei,
Unfortunately you can't drop a datafile that's offline when you use LMTs. So
I'll have to online the datafile to drop it, but to online it I'll have to
recover and since it's noarchive mode I have nothing to recover with.
DAVID HERRING
DBA
Acxiom Corporation
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From: Lei Zeng [mailto:lei.zeng@xxxxxxxxx]
Sent: Wednesday, March 07, 2012 11:13 PM
To: Herring Dave - dherri; oracle-l@xxxxxxxxxxxxx
Subject: Re: Accidentally created local df in RAC
Oracle has a 'drop' datafile command since 10gR2 (if the datafile is empty file)
I never tried myself but I saw it in other people's blog.
Would you please test it out on a development box first? Just be cautious.
alter tablespace <tb name> drop datafile '<file_name> ';
Lei
DBspeed http://dbspeed.com/case_study.html
From: Herring Dave - dherri <Dave.Herring@xxxxxxxxxx>
To: "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>
Sent: Wednesday, March 7, 2012 3:35 PM
Subject: Accidentally created local df in RAC
I've got a potential resume-faxing situation in dealing with a 20+ TB db. This
is on a 6-node RAC, Oracle 10.2.0.4, RHEL 4.x, ASM, OMF.
I added a datafile to a tablespace on node1 and unfortunately forgot the plus
sign in front of the diskgroup. We use OMF so what happened is instead of a
datafile getting added to ASM under <diskgroup>/<db>... it created one on node1
under $ORACLE_HOME/dbs. Of course the other 5 nodes started complaining about
ORA-01157 errors. I saw this right away and quickly offlined the datafile.
Now the datafile has an ONLINE_STATUS of "RECOVER".
Unfortunately the database is in noarchivelog mode and also critical production
(odd combo, I know), so I'm paranoid on trying anything further. My thought is
to use DBMS_FILE_TRANSFER to put the datafile in ASM, then do a rename and
bring it online. Is that the best method? I'm pretty sure nothing got written
to the datafile as DBA_EXTENTS shows no extents in that FILE_ID.
Thoughts?
DAVID HERRING
DBA
Acxiom Corporation
EML dave.herring@xxxxxxxxxx<mailto:dave.herring@xxxxxxxxxx>
TEL 630.944.4762
MBL 630.430.5988
1501 Opus Pl, Downers Grove, IL 60515, USA
WWW.ACXIOM.COM<http://www.acxiom.com/>
The information contained in this communication is confidential, is intended
only for the use of the recipient named above, and may be legally privileged.
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