RE: Is DATAFILE order important in CREATE CONTROLFILE?

Rich,

Interesting one, but the order of files in the CCF really does NOT matter. As far as I could observe, Oracle is able to determine the file number from the datafile header and arrange itself. I regularly clone a 125Gb/205 file (and growing) Apps Database from one server to another and wildly run around for re-locating files in different directories as they grow. I create the CCF from a 'ls -1 /u*/oradata/<SID>/*' appended to a previous part of an older CCF. This captures any new files into the CCF in the _right_ location without me having to create a new ccf by hand every time. A subsequent backup controlfile shows that actual order as it should have been, not necessarily the order in which the previous ccf was created.

John Kanagaraj
Oracle Applications DBA
DBSoft Inc
(W): 408-970-7002

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> -----Original Message-----
> From: Hand, Michael T [mailto:HANDM_at_polaroid.com]
> Sent: Thursday, April 11, 2002 1:54 PM
> To: Multiple recipients of list ORACLE-L
> Subject: RE: Is DATAFILE order important in CREATE CONTROLFILE?
>
>
> Rich,
>
> I believe the datafile order in a CREATE CONTROLFILE
> statement is critical,
> from lowest FILE# to highest. I'd be reluctant to prove
> myself wrong by
> testing our database copy process (I used sed to map the
> datafiles.), but we
> are moving 500-600Gb databases around and rerunning it would
> require another
> 25hr window ;)
>
> -----Original Message-----
> Sent: Thursday, April 11, 2002 3:13 PM
> To: Multiple recipients of list ORACLE-L
>
>
> I'm writing a Perl script to automate the procedure to create
> a copy of an
> 8.1.7 production DB to a development server. Both production
> and dev are
> HP/UX 11.0.
>
> In doing this, I've created a file that cross-references where the
> production datafiles are and where they are to be placed in
> dev. This works
> fine, but I also wanted to dynamically create the CREATE CONTROLFILE
> statement for the "new" dev DB.
>
> I've noticed that the DATAFILE clause does not have the
> SYSTEM tablespace's
> datafile first, nor are any of the other datafiles in the
> same order that
> they are in production (e.g. from the output of an ALTER SYSTEM BACKUP
> CONTROLFILE TO TRACE). Does this matter? Does the order need to be
> preserved?
>
> I suppose I'll end up dynamically creating the
> cross-reference file, which
> would preserve the order, but now I'm curious.
>
> TIA!
>
> Rich Jesse System/Database Administrator
> Rich.Jesse_at_qtiworld.com Quad/Tech International,
> Sussex, WI USA
> --
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Hand, Michael T
> INET: HANDM_at_polaroid.com
>
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-- 
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-- 
Author: John Kanagaraj
  INET: john.kanagaraj_at_hds.com

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