RE: Backup Controlfile and ArchiveLog -- was re Urgent ORA-00600: internal error code
- From: Hemant K Chitale <hkchital@xxxxxxxxxxxxxx>
- To: JDunn@xxxxxxxxx, "John Dunn" <JDunn@xxxxxxxxx>, "Ghassan Salem" <salem.ghassan@xxxxxxxxx>
- Date: Fri, 04 May 2007 21:57:47 +0800
The "USING BACKUP CONTROLFILE" tells Oracle that the SCNs in the
Controlfiles are NOT
the current ones . Oracle keeps prompting for as many archivelogs as
you have available because
it does not know how many you really have.
[Say that on Wednesday you restore the databasefiles as of
Monday. You also do not have the "current"
controlfile of Wednesday. You have had to recreate the controlfile
and tell Oracle that you are
using a Backup Controlfile. Oracle then doesn't know if you have
ArchiveLogs for Monday and also
ArchiveLogs for Tuesday and also ArchiveLogs for Wednesday. You may
have Monday's files
and Tuesday's files but not Wednesday's ArchiveLogs. Oracle just
doesn't know because the
"current" status is not available in the controlfile that you have recreated].
Oracle keeps prompting for the next archivelog until you have applied
all your archivelogs
at which point YOU as the DBA must say CANCEL and then OPEN RESETLOGS.
Why Archivelogs ? Again, because information is no longer
available in the controlfile
that you have intialized ! If you really have no ArchiveLogs [you
weren't running ArchiveLog !]
just say CANCEL and then OPEN RESETLOGS.
In all cases, ensure that you HAVE CORRECTLY CREATED THE CONTROLFILEs,
naming every DataFile -- once you OPEN, Oracle does a Data
Dictionary check and any
datafile in the Data Dictionary but not in your Controlfile becomes
a "MISSING" datafile !
{so sometimes we do another backup, if we can, before the OPEN RESETLOGS !}
Having said all that, why are you sure that you DID need to recreate
your controlfiles
and reset your online logs ? Was the problem something to do with
mountpoints and
permissions only ?
Hemant
At 07:33 PM Friday, John Dunn wrote:
OK, I have recreated the control file but when I run RECOVER
DATABASE USING BACKUP CONTROLFILE I get the following errors.
I am not and never have been using archivelogs so why is it asking
for this file?
SQL> RECOVER DATABASE USING BACKUP CONTROLFILE;
ORA-00279: change 406102834 generated at 05/02/2007 03:19:46 needed
for thread1
John
----------
Hemant K Chitale
http://web.singnet.com.sg/~hkchital
and
http://hemantscribbles.blogspot.com
and
http://hemantoracledba.blogspot.com
"First they ignore you, then they laugh at you, then they fight you,
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