Re: Accidentally created local df in RAC
Date: Wed, 7 Mar 2012 21:14:41 -0800 (PST)
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> ';
From: Herring Dave - dherri <Dave.Herring_at_acxiom.com> To: "oracle-l_at_freelists.org" <oracle-l_at_freelists.org> 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.
EML dave.herring_at_acxiom.com TEL 630.944.4762 MBL 630.430.5988
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