Oracle-L: RE: Is DATAFILE order important in CREATE CONTROLFILE?

From: Jack van Zanen <nlzanen1_at_EY.NL>
Date: Thu, 11 Apr 2002 23:33:19 -0800
Message-ID: <F001.00442E23.20020411233319@fatcity.com>

I hope it doesn't matter. We have been using dynamically created "create controlfile" for years now to copy production DB to test/developnment. I believe the files are alfabetical in our case.

jack

                                                                                                                                       
                      "Hand, Michael T"                                                                                                
                      <HANDM_at_polaroid.c        To:       Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>                   
                      om>                      cc:       (bcc: Jack van Zanen/nlzanen1/External/MEY/NL)                                
                      Sent by:                 Subject:  RE: Is DATAFILE order important in CREATE CONTROLFILE?                        
                      root_at_fatcity.com                                                                                                 
                                                                                                                                       
                                                                                                                                       
                      11-04-2002 22:53                                                                                                 
                      Please respond to                                                                                                
                      ORACLE-L

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
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Author: Hand, Michael T
INET: HANDM_at_polaroid.com

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Author: Jack van Zanen
INET: nlzanen1_at_EY.NL

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